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Fast and fast. And those training treats faster than you can say sit. Fast. Fast. Free delivery. It's on Prime. Welcome to Sherlock Holmes Short Stories. I'm Hugh Bonneville and from the Noiser Podcast Network. This is the Adventure of the Devil's foot Poet Part 2. Last time, Holmes and Watson's peaceful retreat to the Cornish coast was interrupted when the local vicar, Mr. Roundhay, and his lodger, Mortimer Tregennis, came to them with a chilling mystery. The previous evening, Mortimer had played cards with his two brothers and sister at their family home, Tredannick Wartha. When he returned the next day, he was greeted by a horrific scene. His sister was dead, her face contorted in sheer terror, and his two brothers had seemingly gone mad from fright. Holmes and Watson headed to Trejannock Wartha to investigate. Everything was exactly as it had been left. The cards were still on the table, the candles had burned down to the stump and there was no sign of an intruder. Their elderly housekeeper, Mrs. Porter, hadn't heard any sign of struggle and was so terrified by the discovery that she. That she was leaving her position. That very day. While Holmes searched for clues, Mortimer revealed that just before he left, his brother George had stared intently at the window behind him. When Mortimer turned around to see what he was looking at, he thought he saw some movement in the bushes. Holmes examined the flower bed outside the window, but could find no sign that anyone or anything had been there. Holmes and Watson left the scene feeling baffled. Then came an unexpected development. The famous explorer Dr. Leon Sterndale appeared, having abandoned his most recent expedition to Africa upon receiving a telegram about the tragedy. His intense interest in the case and his supposed connection to the family aroused Holmes suspicion. But after following up on Sterndale's story, he found he was telling the truth. The investigation reached a standstill. But a frantic visitor is about to arrive with news that will change the course of Holmes and Watson's investigation. I was shaving at my window in the morning when I heard the rattle of hooves and, and looking up, saw a dog cart coming at a gallop down the road. It pulled up at our door and our friend the vicar sprang from it and rushed up our garden path. Holmes was already dressed and we hastened down to meet him. Our visitor was so excited that he could hardly articulate. But at last, in gasps and bursts, his tragic story came out of him. We are devil ridden, Mr. Holmes. My poor parish is devil ridden. He cried. Satan himself is loose in it. We are given over. Into his hands he danced about in his agitation. A ludicrous object if it were not for his ashy face and startled eyes. Finally he shot out his terrible news. Mr. Mortimer Tregennis died during the night and with exactly the same symptoms as the rest of his. Holmes sprang to his feet, all energy in an instant. Can you fit us both into your dog cart? Yes, I can. Then Watson, we will postpone our breakfast. Mr. Roundhay, we are entirely at your disposal. Hurry, hurry before things get disarranged. The lodger occupied two rooms at the vicarage which were in an angle by themselves, the one above, the other below was a large sitting room above his bedroom. They looked out upon a croquet lawn which came up to the windows. We had arrived before the doctor or the police so that everything was absolutely undisturbed. Let me describe exactly the scene as we saw it upon that misty March morning. It has left an impression which can never be effaced from my mind. The atmosphere of the room was of a horrible and depressing stuffiness. The servant who had first entered had thrown up the window or it would have been even more intolerable. This might partly be due to the fact that a lamp stood flaring and smoking on the centre table. Beside it sat the dead man leaning back in his chair, his thin beard projecting, his spectacles pushed up onto his forehead and his lean dark face turned towards the window and twisted into the same distortion of terror which had marked the features of his dead sister. His limbs were convulsed and his fingers contorted as though he had died in a very paroxysm of fear. He was fully clothed, though there were signs that his dressing had been done in a hurry. We had already learned that his bed had been slept in and that the tragic end had come to him. In the early morning one realized the red hot energy which underlay Holmes phlegmatic exterior when one saw the sudden change which came over him from the moment that he entered the fatal apartment. In an instant he was tense and alert, his eyes shining, his face set, his limbs quivering with eager activity. He was out on the lawn, in through the window, round the room and up into the bedroom for all the world like a dashing foxhound drawing a cover in the bedroom he made a rapid cast around and ended by throwing open the window which appeared to give him some fresh cause for excitement for he leaned out of it with loud ejaculations of interest and delight. Then he rushed down the stair, out through the open window, threw himself upon his face on the lawn, sprang up and into the room once more, all with the energy of the hunter who is at the very heels of his quarry. The lamp, which was an ordinary standard, he examined with minute care, making certain measurements upon its bowl. He carefully scrutinized with his lens the talc shield which covered the top of the chimney and scraped off some ashes which adhered to its upper surface, putting some of them into an envelope which he placed in his pocketbook. Finally, just as the doctor and the official police put in an appearance, he beckoned to the vicar and we all three went out upon the lawn. I am glad to say that my investigation has not been entirely barren, he remarked. I cannot remain to discuss the matter with the police but I should be exceedingly obliged. Mr. Roundhay, if you would give the inspector my compliments and direct his attention to the bedroom window and to the sitting room lamp. Each is suggestive and together they are almost conclusive. If the police would desire further information I shall be happy to see any of them at the cottage. And now Watson, I think that perhaps we shall be better employed elsewhere. It may be that the police resented the intrusion of an amateur or that they imagined themselves to be upon some hopeful line of investigation, but it is certain that we heard nothing from them for the next two days. During this time Holmes spent some of his time smoking and dreaming in the cottage but a greater portion in country walks which he undertook alone, returning after many hours without remark as to where he had been. One experiment served to show me the line of his investigation. He had bought a lamp which was the duplicate of the one which had burned in the room of Mortimer Tregennis on the morning of the tragedy. This he filled with the same oil as that used at the vicarage and he carefully timed the period which it take to be exhausted. Another experiment which he made was of a more unpleasant nature and one which I am not likely ever to forget.
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You will remember Watson, he remarked one afternoon, that there is a single common point of Resemblance in the varying reports which have reached us. This concerns the effect of the atmosphere of the room in each case upon those who have first entered it. You will recollect that Mortimer Tregennis, in describing the episode of his last visit to his brother's house, remarked that the doctor, on entering the room fell into a chair. You had forgotten. Well I can answer for it that it was so. Now you will remember also that Mrs. Porter the housekeeper told us that she herself fainted upon entering the room and had afterwards opened the window. In the second case, that of Mortimer Tregennis himself, you cannot have forgotten the horrible stuffiness of the room when we arrived though the servant had thrown open the window. That servant I found upon inquiry was so ill that she had gone to her bed. You will admit, Watson, that these facts are very suggestive. In each case there is evidence of a poisonous atmosphere. In each case also there is a combustion going on in the room. In the one case a fire, in the other a lamp. The fire was needed but the lamp was lit as a comparison of the oil consumed will show long after it was broad daylight. Why? Surely because there is some connection between three things the burning, the stuffy atmosphere and finally the madness or dangerous death of those unfortunate people. That is clear, is it not? Well it would appear so. At least we may accept it as a working hypothesis. We will suppose then that something was burned in each case which produced an atmosphere causing strange toxic effects. Very good. In the first instance, that of the Tregenis family, this substance was placed in the fire. Now the window was shut but the fire would naturally carry fumes to some extent up the chimney. Hence one would expect the effects of the poison to be less than in the second case where there was less escape for the vapor. The result seems to indicate that it was so since in the first case only the woman who had presumably the more sensitive organism was killed, the others exhibiting that temporary or permanent lunacy which is evidently the first effect of the drug. In the second case the result was complete. The facts therefore seem to bear out the theory of a poison which worked by combustion. With this train of reasoning in my head I naturally looked about in Mortimer Tregennis's room to find some remains of this substance. The obvious place to look was the talc shelf or smoke guard of the lamp. There, sure enough I perceived a number of flaky ashes and round the edges a fringe of brownish powdered which had not yet been consumed. Half of this I took, as you saw, and I placed it in an envelope. Why half Holmes. It is not for me, my dear Watson, to stand in the way of the official police force. I leave them all the evidence which I found. The poison still remained upon the talc. Had they the wit to find it? Now, Watson, we will light our lamp. We will, however, take the precaution to open our window to avoid the premature decease of two deserving members of society. And you will seat yourself near that open window in an armchair, unless, like a sensible man, you determine to have nothing to do with the affair. Oh, you will see it out, will you? I thought I knew my Watson. This chair I will place opposite yours so that we may be the same distance from the poison and face to face the door we will leave ajar. Each is now in a position to watch the other and to bring the experiment to an end should the symptoms seem alarming. Is that all clear? Well then, I take our powder, or what remains of it from the envelope and I lay it above the burning lamp. So now, Watson, let us sit down and await developments. They were not long in coming. I had hardly settled in my chair before I was conscious of a thick, musky odour, subtle and nauseous at the very first whiff of it. My brain and my imagination were beyond all control. A thick black cloud swirled before my eyes and my mind told me that in this cloud, unseen as yet but about to spring out upon my appalled senses, lurked all that was vaguely horrible, all that was monstrous and inconceivably wicked in the universe. Vague shapes swirled and swam amid the dark cloud bank, each a menace and a warning of something coming, the advent of some unspeakable dweller upon the threshold whose very shadow would blast my soul. A freezing horror took possession of me. I felt that my hair was rising, that my eyes were protruding, that my mouth was opened and my tongue like leather. The turmoil within my brain was such that something must surely snap. I tried to scream and was vaguely aware of some hoarse croak which was my own voice, but distant and detached from myself. At the same moment, in some effort of escape, I broke through that cloud of despair and had a glimpse of Holmes, face white, rigid and drawn with horror. The very look which I had seen upon the features of the dead. It was that vision which gave me an instant of sanity and of strength. I dashed from my chair, threw my arms round Holmes and together we lurched through the door and an instant afterwards had thrown ourselves down upon the grass plot and were lying side by side, conscious only of the glorious sunshine which was bursting its way through the hellish cloud of terror which had girt us in. Slowly it rose from our souls like the mists from a landscape until peace and reason had returned and we were sitting upon the grass, wiping our clammy foreheads and looking with apprehension at each other to mark the last traces of that terrific experience which we had undergone. Upon my word, Watson, said Holmes at last with an unsteady voice, I owe you both my thanks and an apology. It was an unjustifiable experiment even for one's self and doubly so for a friend. I am really very sorry, you know, I answered with some emotion, for I have never seen so much of Holmes's heart before that it is my greatest joy and privilege to help you. He relapsed at once into the half humorous, half cynical vein which was his habitual attitude to those about him. It would be superfluous to drive us mad, my dear Watson, said he. A candid observer would certainly declare that we were so already before we embarked upon so wild an experiment. I confess that I never imagined that the effect could be so sudden and so severe. He dashed into the cottage and reappearing with the burning lamp held at full arm's length, he threw it among a bank of brambles. We must give the room a little time to clear. I take it, Watson, that you have no longer a shadow of a doubt as to how these tragedies were produced? None whatsoever, but the cause remains as obscure as before. Come into the Arby here and let us discuss it together. That villainous stuff seems still to linger round my throat. I think we must admit that all the evidence points to this man, Mortimer Tregennis, having been the criminal in the first tragedy, though he was the victim in the second one. We must remember in the first place that there is some story of a family quarrel followed by a reconciliation. How bitter that quarrel may have been or how hollow the reconciliation we cannot tell. When I think of Mortimer Tregennis with the foxy face and the small shrewd beady eyes behind the spectacles he is not a man whom I should judge to be of a particularly forgiving disposition. Well, in the next place you will remember that this idea of someone moving in the garden which took our attention for a moment from the real cause of the tragedy emanated from him. He had a motive in misleading us. Finally, if he did not throw the substance into the fire at the moment of leaving the room, who did do so? The affair happened immediately after his departure. Had anyone else come in, the family would certainly have Risen from the table. Besides, in peaceful Cornwall visitors did not arrive after 10 o' clock at night. We may take it then that all the evidence points to Mortimer Tregennis as the culprit. Then his own death was suicide? Well Watson, it is on the face of it a not impossible supposition. The man who had the guilt upon his soul of having brought such a fate upon his own family might well be driven by remorse to inflict it upon himself. There are, however, some cogent reasons against it. Fortunately there is one man in England who knows all about it and I have made arrangements by which we shall hear the facts this afternoon from his own lips. Ah, he is a little before his time. Perhaps you would kindly step this way. Dr. Leon Sterndale. We have been conducting a chemical experiment indoors which has left our little room hardly fit for the reception of so distinguished a visitor. I had heard the click of the garden gate and now the majestic figure of the great African explorer appeared upon the path. He turned in some surprise towards the rustic arbour in which we sat. You sent for me, Mr. Holmes? I had your note about an hour ago and I have come, though I really do not know why I should obey your summons. Perhaps we can clear the point up before we separate, said Holmes. Meanwhile I am much obliged to you for your courteous acquiescence. You will excuse this informal reception in the open air but my friend Watson and I have nearly furnished an additional chapter to what the papers call the Cornish horror and we prefer a clear atmosphere for the present perhaps since the matters which we have to discuss will affect you personally in a very intimate fashion. It is as well that we should talk where there can be no eavesdropping. The explorer took his cigar from his lips and gazed sternly at my companion. I am at a loss to know, sir, he said, what you can have to speak about which affects me personally in a very intimate fashion. The killing of Mortimer Tregennis, said Holmes. For a moment I wished that I were armed. Sterndale's fierce face turned to a dusky red. His eyes glared and the knotted, passionate veins started out in his forehead while he sprang, sprang forward with clenched hands towards my companion. Then he stopped and with a violent effort he resumed a cold rigid calmness which was perhaps more suggestive of danger than his hot headed outburst. I have lived so long beyond the law, said he, that I have got into the way of being a law to myself. You would do well, Mr. Holmes, not to forget it for I have no desire to do you an injury nor have I any Desire to do you an injury, Dr. Sterndale. Surely the clearest proof of it is that knowing what I know, I have sent for you and not for the police. Sterndale sat down with a gasp, overawed. For perhaps the first time in his adventurous life there was a calm assurance of power in Holmes's manner which could not be withstood. Our visitor stammered for a moment, his great hands opening and shutting in his agitation. What do you mean, he asked at last. If this is bluff upon your part, Mr. Holmes, you have chosen a bad man for your experiment. Let us have no more beating about the bush. What do you mean? I will tell you, said Holmes, and the reason why I tell you is that I hope frankness may beget frankness. What my next step may be will depend entirely upon the nature of your own defence. My defence? Yes, sir. My defence against what? Against the charge of killing Mortimer Tregennis. Sterndale mopped his forehead with his handkerchief. Upon my word you are getting on, said he. Do all your successes depend upon this prodigious power of bluff? The bluff, said Holmes sternly, is upon your side, Dr. Leon Sterndale, and not upon mine. As a proof I will tell you some of the facts upon which my conclusions are based of your return from Plymouth allowing much of your property to go on to Africa. I will say nothing save that it first informed me that you were one of the factors which had to be taken into account in reconstructing this drama. I came back. I have heard your reasons and regard them as unconvincing and inadequate. We will pass that you came down here to ask me whom I suspected. I refused to answer you. You then went to the vicarage, waited outside it for some time and finally returned to your cottage. How do you know that I followed you? I saw no one. That is what you may expect to see when I follow you. You spent a restless night at your cottage and you formed certain plans which in the early morning you proceeded to put into execution. Leaving your door just as day was breaking, you filled your pocket with some reddish gravel that was lying heaped beside your gate. Sterndale gave a violent start and looked at Holmes in amazement. You then walked swiftly for the mile which separated you from the vicarage. You were wearing, I may remark, the same pair of ribbed tennis shoes which are at the present moment upon your feet. At the vicarage you passed through the orchard and the side hedge coming out under the window of the lodger Tregennis. It was now daylight but the household was not yet stirring. You drew some of the gravel from your pocket and you threw it up at the window above you. Sterndale sprang to his feet. I believe that you are the devil himself. He cried. Holmes smiled at the compliment. It took two or possibly three handfuls before the lodger came to the window. You beckoned him to come down. He dressed hurriedly and descended to his sitting room. You entered by the window. There was an interview, a short one, during which you walked up and down the room. Then you passed out and closed the window, standing on the lawn outside, smoking a cigar and watching what occurred. Finally, after the death of Tregennis, you withdrew as you had come. Now, Dr. Sterndale, how do you justify such conduct? And what were the motives for your actions? If you prevaricate or trifle with me, I give you my assurance that the matter will pass out of my hands forever. Our visitor's face had turned ashen grey as he listened to the words of his accuser. Now he sat for some time in thought with his face sunk in his hands. Then, with a sudden impulsive gesture, he plucked a photograph from his breast pocket and threw it on the rustic table before us. That is why I have done it, said he.
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It showed the bust and face of a very beautiful woman. Holmes stooped over it. Brenda Tregennis, said he. Yes, Brenda Tregennis, repeated our visitor. For years I have loved her. For years she has loved me. There is the secret of the Cornish seclusion which people have marveled at. It has brought me close to the one thing on earth that was dear to me. I could not marry her, for I have a wife who has left me for years, and yet whom, by the deplorable laws of England, I could not divorce. For years Brenda waited. For years I waited. And this is what we have waited for. A terrible sob shook his great frame and he clutched his throat under his brindled beard. Then, with an effort, he mastered himself and spoke on. The vicar knew he was in our confidence. He would tell you that she was an angel upon earth. That was why he telegraphed to me and I returned what was my baggage or Africa to me when I learned that such a fate had come upon my darling? There you have the missing clue to my action, Mr. Holmes. Proceed, said my friend. Dr. Sterndale drew from his pocket a paper packet and laid it upon the table. On the outside was written Radix pedis diaboli with a red poison label beneath it. He pushed it towards me. I understand that you are a doctor, sir. Have you ever heard of this preparation devil's foot root? No, I have never heard of. Is no reflection upon your professional knowledge, said he, for I believe that save for one sample in a laboratory at Buda, there is no other specimen in Europe. It has not yet found its way either into the pharmacopoeia or into the literature of toxicology. The root is shaped like a foot, half human, half goat like, hence the fanciful name given by a botanical missionary. It is used as an ordeal poison by the medicine men in certain districts of West Africa and is kept as a secret among them. This particular specimen I obtained under very extraordinary circumstances in the Ubangi country. He opened the paper as he spoke and disclosed a heap of reddish brown snuff like powder. Well, sir? Asked Holmes sternly. I am about to tell you, Mr. Holmes, all that actually occurred for you already know so much that it is clearly to my interest that you should know all. I have already explained the relationship in which I stood to the Tregennis family for the sake of the sister. I was friendly with the brothers. There was a family quarrel about money which estranged this man Mortimer, but it was supposed to be made up and I afterwards met him as I did the others. He was a sly, subtle, scheming man and several things arose which gave me a suspicion of him. But I had no cause for any positive quarrel. One day, only a couple of weeks ago, he came down to my cottage and I showed him some of my African curiosities. Among other things I exhibited this powder and I told him of its strange properties, how it stimulates those brain centers which control the emotion of fear and how either madness or death is the fate of the unhappy native who is subjected to the ordeal by the priest of his tribe. I told him also how powerless European science would be to detect it. How he took it I cannot say, for I never left the room. But there is no doubt that it was then while I was opening cabinets and stooping to boxes that he managed to abstract some of the devil's foot root. I will remember how he plied me with questions as to the amount and the Time that was needed for its effect. But I little dreamed that he could have a personal reason for asking. I thought no more of the matter until the vicar's telegram reached me at Plymouth. This villain had thought that I would be at sea before the news could reach me and that I should be lost for years in Africa. But I returned at once. Of course I could not listen to the details without feeling assured that my poison had been used. I came round to see you on the chance that some other explanation had suggested itself to you. But there could be none. I was convinced that Mortimer Tregennis was the murderer, that for the sake of money and with the idea perhaps that if the other members of his family were all insane he would be the sole guardian of their joint property. He had used the devil's foot powder upon them, driven two of them out of their senses and killed his sister Brenda. The one human being whom I have ever loved or who has ever loved me. There was his crime. What was to be his punishment? Should I appeal to the law? Where were my proofs? I knew that the facts were true. But could I help to make a jury of countrymen believe so fantastic a story? I might or I might not. But I could not afford to fail. My soul cried out for revenge. I have said to you once before, Mr. Holmes, that I have spent much of my life outside the law, I. And that I have come at last to be a law to myself. So it was even now I determined that the fate which he had given to others should be shared by himself. Either that or I would do justice upon him with my own hand. In all England there can be no man who sets less value upon his own life than I do at the present moment. Now I have told you all. You have yourself supplied the rest. I did as you say. After a restless night, set off early from my cottage. I foresaw the difficulty of arousing him. So I gathered some gravel from the pile which you have mentioned and I used it to throw up to his window. He came down and admitted me through the window of the sitting room. I laid his offense before him. I told him that I had come both as judge and executioner. The wretch sank into a chair paralyzed at the sight of my revolver. I lit the lamp, put the powder above it and stood outside the window ready to carry out my threat to shoot him should he try to leave the room. In five minutes he died. God, how he died. But my heart was flint for he endured nothing which my innocent darling had not felt before him. There is my story, Mr. Holmes. Perhaps if you loved a woman, you would have done as much yourself. At any rate, I am in your hands. You can take what steps you like. As I have already said, there is no man living who can fear death less than I do. Holmes sat for some little time in silence. What were your plans? He asked at last. I had intended to bury myself in Central Africa. My work there is but half finished. Go and do the other half, said Holmes. I, at least, am not prepared to prevent you. Dr. Sterndale raised his giant figure, bowed gravely and walked from the arbour. Holmes lit his pipe and handed me his pouch. Some fumes which are not poisonous would be a welcome change, said he. I think you must agree, Watson, that it is not a case in which we are called upon to interfere. Our investigation has been independent and our action shall be so also. You would not denounce the man? Certainly not, I answered. I have never loved Watson, but if I did, and if the woman I loved had met such an end, I might act even as our lawless lion hunter has done. Who knows? Well, Watson, I will not offend your intelligence by explaining what is obvious. The gravel upon the window sill was of course, the starting point of my research. It was unlike anything in the Vicarage garden. Only when my attention had been drawn to Dr. Sterndale and his cottage did I find its counterpart. The lamp shining in broad daylight and the remains of powder upon the shield were successive links in a fairly obvious change. And now, my dear Watson, I think we may dismiss the matter from our mind and go back with a clear conscience to the study of those Chaldean roots which are surely to be traced in the Cornish branch of the great Celtic speech. Next time on Sherlock Holmes Short Stories. We follow Holmes and Watson into the treacherous world of high finance in the Adventure of the Beryl Coronet. When one of England's most treasured crown jewels is put in the care of a well respected London banker, he believes it will be safe in his family home. But in the dead of night the precious relic is damaged and some of its gems stolen. The banker immediately blames his wayward son. But Holmes suspects there's more to the case than meets the eye. And as he investigates, he uncovers something far more sinister than simple theft. From the grand halls of London to the snowy grounds of a country estate, the great detective will follow a trail of clues that leads him to the heart of a wickedly deceptive conspiracy that threatens to shake the foundations of British high society. That's next time can't wait a week until the next episode. Well, listen to it right away by subscribing to Noiser Plus. Head to www.noiser.comscriptions for more information or click the link in the episode description. When did making plans get this complicated? It's time to streamline with WhatsApp, the secure messaging app that brings the whole group together, use polls to settle dinner plans, send event invites and pinned messages so no one forgets mom 60th and never miss a meme or milestone. All protected with end encryption. It's time for WhatsApp message privately with everyone. Learn more at WhatsApp. Com.
Podcast: Sherlock Holmes Short Stories (Noiser)
Episode: The Adventure of the Devil’s Foot: Part Two
Release Date: September 3, 2025
Narrator: Hugh Bonneville
This episode brings the tense resolution of “The Adventure of the Devil’s Foot,” with Sherlock Holmes and Dr. Watson deciphering a string of terrifying and supernatural-seeming tragedies at the Cornish coast. Murders, madness, and a mysterious poison culminate in a vérité moment of justice and heartbreak. The story explores not only the unraveling of a clever, deadly plot, but also deep motives of revenge, forbidden love, and the ethics of justice outside the law.
Setting: Holmes and Watson are summoned by a frantic vicar, Mr. Roundhay, who brings the news that Mortimer Tregennis has died in the night—mirroring the fate of his siblings.
Scene: Upon arrival at the vicarage:
Clue Gathering: Holmes’s investigation focuses on the window, the lamp, and collects ashes from the lamp’s talc shield.
"I am glad to say that my investigation has not been entirely barren..."
— Holmes, (16:40)
Reasoning: Holmes notices a commonality in all incidents: the oppressive atmosphere in each death room—suggesting a poisonous vapor created by combustion (fire or lamp).
Experiment: Holmes tests this hypothesis by recreating the conditions with a duplicate lamp and the probable poison, with Watson at hand.
"Now, Watson, we will light our lamp. We will, however, take the precaution to open our window to avoid the premature decease of two deserving members of society."
— Holmes, (10:40)
Results: Both men experience a brief, intense terror and hallucination before Watson breaks the “spell” and they flee outside. Holmes admits this was highly dangerous and thanks Watson for his loyalty and quick action.
"Upon my word, Watson ... I owe you both my thanks and an apology. It was an unjustifiable experiment even for one's self, and doubly so for a friend."
— Holmes, (13:30)
Holmes deduces that Mortimer Tregennis was guilty of using the poison (devil’s foot root) on his own family:
"We must remember ... there is some story of a family quarrel followed by a reconciliation. How bitter that quarrel may have been or how hollow the reconciliation we cannot tell."
— Holmes, (14:15)
Mortimer’s own death could not plausibly be suicide—there are indications of another agency.
Holmes summons Dr. Leon Sterndale, renowned explorer and family friend, to account for himself and reveals he knows Sterndale's movements.
Holmes reconstructs Sterndale’s actions using physical evidence (gravel, footprints, lamp, and so on).
Under pressure, Sterndale presents a photograph of Brenda Tregennis, confessing his long secret love:
"For years I have loved her. For years she has loved me... I could not marry her, for I have a wife who has left me for years, and yet whom, by the deplorable laws of England, I could not divorce."
— Dr. Sterndale, (27:01)
Sterndale describes how, after showing Mortimer the rare “devil’s foot root” (a powerful fear-inducing poison he collected in West Africa), Mortimer stole a portion to kill his siblings—hoping to inherit their property.
Outraged and heartbroken by Brenda’s murder, Sterndale took justice into his own hands: he gave Mortimer the same death using the stolen poison.
"There is my story, Mr. Holmes. Perhaps if you loved a woman, you would have done as much yourself. At any rate, I am in your hands. You can take what steps you like."
— Dr. Sterndale, (31:09)
Holmes decides not to turn Sterndale over to the police, believing the law would not understand or accept the bizarre circumstances and motivations:
"Go and do the other half [of your work in Africa]. I, at least, am not prepared to prevent you."
— Holmes, (32:42)
Holmes and Watson agree that this is a case best left out of official hands—a rare moment where Holmes’s justice is tempered by sympathy and humanity.
“I have never loved, Watson, but if I did, and if the woman I loved had met such an end, I might act even as our lawless lion-hunter has done. Who knows?”
— Holmes, (34:05)
Holmes’s Description of the Crime Scene:
"The atmosphere of the room was of a horrible and depressing stuffiness... his lean dark face turned towards the window and twisted into the same distortion of terror which had marked the features of his dead sister."
— Watson, (04:00)
The Experiment's Terrifying Effect:
"A thick black cloud swirled before my eyes ... in this cloud, unseen as yet but about to spring out upon my appalled senses, lurked all that was vaguely horrible, all that was monstrous and inconceivably wicked in the universe."
— Watson, (12:28)
Confrontation and Confession:
"I have lived so long beyond the law… you would do well, Mr. Holmes, not to forget it for I have no desire to do you an injury..."
— Dr. Sterndale, (22:50)
“The Adventure of the Devil’s Foot: Part Two” presents a chilling, deeply emotive mystery that probes not only exotic chemistry and deduction but the very limits of revenge and natural justice. Holmes solves the puzzle, exposing both the culprit and the avenger, but ultimately leaves the final act of judgment to fate and forgiveness. The episode is a showcase for the humanity beneath the legendary detective’s disciplined mind, dramatized with suspense and pathos for listeners new and old to Sherlock Holmes.