Commenting upon one of my earlier novels, in respect of which I had claimed to have been careful to adhere to common probabilities and to have made use only of really practicable methods of investigation, a critic remarked that this was of no consequence whatever, so long as the story was amusing.

Few people, I imagine, will agree with him. To most readers, and certainly to the kind of reader for whom an author is willing to take trouble, complete realism in respect of incidents and methods is an essential factor in maintaining the interest of a detective story. Hence it may be worth while to mention that Thorndyke's method of producing the track chart, described in Chapters II and III, has been actually used in practice. It is a modification of one devised by me many years ago when I was crossing Ashanti to the city of Bontuku, the whereabouts of which in the far interior was then only vaguely known. My instructions were to fix the positions of all towns, villages, rivers and mountains as accurately as possible; but finding ordinary methods of surveying impracticable in the dense forest which covers the whole region, I adopted this simple and apparently rude method, checking the distances whenever possible by astronomical observation.

The resulting route-map was surprisingly accurate, as shown by the agreement of the outward and homeward tracks, It was published by the Royal Geographical Society, and incorporated in the map of this region compiled by the Intelligence Branch of the War Office, and it formed the basis of the map which accompanied my volume of Travels in Ashanti and Jaman. So that Thorndyke's plan must be taken as quite a practicable one.

New Inn, the background of this story, and one of the last surviving inns of Chancery, has recently passed away after upwards of four centuries of newness. Even now, however, a few of the old, dismantled houses (including perhaps, the mysterious 31) may be seen from the Strand peeping over the iron roof of the skating rink which has displaced the picturesque hall, the pension-room and the garden. The postern gate, too, in Houghton Street still remains, though the arch is bricked up inside. Passing it lately, I made the rough sketch which appears on next page, and which shows all that is left of this pleasant old London backwater.

R. A. F.
GRAVESEND

Chapter I

The Mysterious Patient

As I look back through the years of my association with John Thorndyke, I am able to recall a wealth of adventures and strange experiences such as falls to the lot of very few men who pass their lives within hearing of Big Ben. Many of these experiences I have already placed on record; but it now occurs to me that I have hitherto left unrecorded one that is, perhaps, the most astonishing and incredible of the whole series; an adventure, too, that has for me the added interest that it inaugurated my permanent association with my learned and talented friend, and marked the close of a rather unhappy and unprosperous period of my life.

Memory, retracing the journey through the passing years to the starting-point of those strange events, lands me in a shabby little ground-floor room in a house near the Walworth end of Lower Kennington Lane. A couple of framed diplomas on the wall, a card of Snellen's test-types and a stethoscope lying on the writing-table, proclaim it a doctor's consulting-room; and my own position in the round-backed chair at the said table, proclaims me the practitioner in charge.

It was nearly nine o'clock. The noisy little clock on the mantelpiece announced the fact, and, by its frantic ticking, seemed as anxious as I to get the consultation hours over. I glanced wistfully at my mud-splashed boots and wondered if I might yet venture to assume the slippers that peeped coyly from under the shabby sofa. I even allowed my thoughts to wander to the pipe that reposed in my coat pocket. Another minute and I could turn down the surgery gas and shut the outer door. The fussy little clock gave a sort of preliminary cough or hiccup, as if it should say: "Ahem! ladies and gentlemen, I am about to strike." And at that moment, the bottle-boy opened the door and, thrusting in his head, uttered the one word: "Gentleman."

Extreme economy of words is apt to result in ambiguity. But I understood. In Kennington Lane, the race of mere men and women appeared to be extinct. They were all gentlemen—unless they were ladies or children—even as the Liberian army was said to consist entirely of generals. Sweeps, labourers, milkmen, costermongers—all were impartially invested by the democratic bottle-boy with the rank and title of armigeri. The present nobleman appeared to favour the aristocratic recreation of driving a cab or job-master's carriage, and, as he entered the room, he touched his hat, closed the door somewhat carefully, and then, without remark, handed me a note which bore the superscription "Dr. Stillbury."

"You understand," I said, as I prepared to open the envelope, "that I am not Dr. Stillbury. He is away at present and I am looking after his patients."

"It doesn't signify," the man replied. "You'll do as well."

On this, I opened the envelope and read the note, which was quite brief, and, at first sight, in no way remarkable.

"DEAR SIR," it ran, "Would you kindly come and see a friend of mine who is staying with me? The bearer of this will give you further particulars and convey you to the house. Yours truly, H. WEISS."

There was no address on the paper and no date, and the writer was unknown to me.

"This note," I said, "refers to some further particulars. What are they?"

The messenger passed his hand over his hair with a gesture of embarrassment. "It's a ridicklus affair," he said, with a contemptuous laugh. "If I had been Mr. Weiss, I wouldn't have had nothing to do with it. The sick gentleman, Mr. Graves, is one of them people what can't abear doctors. He's been ailing now for a week or two, but nothing would induce him to see a doctor. Mr. Weiss did everything he could to persuade him, but it was no go. He wouldn't. However, it seems Mr. Weiss threatened to send for a medical man on his own account, because, you see, he was getting a bit nervous; and then Mr. Graves gave way. But only on one condition. He said the doctor was to come from a distance and was not to be told who he was or where he lived or anything about him; and he made Mr. Weiss promise to keep to that condition before he'd let him send. So Mr. Weiss promised, and, of course, he's got to keep his word."

"But," I said, with a smile, "you've just told me his name—if his name really is Graves."

"You can form your own opinion on that," said the coachman.

"And," I added, "as to not being told where he lives, I can see that for myself. I'm not blind, you know."

"We'll take the risk of what you see," the man replied. "The question is, will you take the job on?"

Yes; that was the question, and I considered it for some time before replying. We medical men are pretty familiar with the kind of person who "can't abear doctors," and we like to have as little to do with him as possible. He is a thankless and unsatisfactory patient. Intercourse with him is unpleasant, he gives a great deal of trouble and responds badly to treatment. If this had been my own practice, I should have declined the case off-hand. But it was not my practice. I was only a deputy. I could not lightly refuse work which would yield a profit to my principal, unpleasant though it might be.

As I turned the matter over in my mind, I half unconsciously scrutinized my visitor—somewhat to his embarrassment—and I liked his appearance as little as I liked his mission. He kept his station near the door, where the light was dim—for the illumination was concentrated on the table and the patient's chair—but I could see that he had a somewhat sly, unprepossessing face and a greasy, red moustache that seemed out of character with his rather perfunctory livery; though this was mere prejudice. He wore a wig, too—not that there was anything discreditable in that—and the thumb-nail of the hand that held his hat bore disfiguring traces of some injury—which, again, though unsightly, in no wise reflected on his moral character. Lastly, he watched me keenly with a mixture of anxiety and sly complacency that I found distinctly unpleasant. In a general way, he impressed me disagreeably. I did not like the look of him at all; but nevertheless I decided to undertake the case.

"I suppose," I answered, at length, "it is no affair of mine who the patient is or where he lives. But how do you propose to manage the business? Am I to be led to the house blindfolded, like the visitor to the bandit's cave?"

The man grinned slightly and looked very decidedly relieved.

"No, sir," he answered; "we ain't going to blindfold you. I've got a carriage outside. I don't think you'll see much out of that."

"Very well," I rejoined, opening the door to let him out, "I'll be with you in a minute. I suppose you can't give me any idea as to what is the matter with the patient?"

"No, sir, I can't," he replied; and he went out to see to the carriage.

I slipped into a bag an assortment of emergency drugs and a few diagnostic instruments, turned down the gas and passed out through the surgery. The carriage was standing at the kerb, guarded by the coachman and watched with deep interest by the bottle-boy. I viewed it with mingled curiosity and disfavour. It was a kind of large brougham, such as is used by some commercial travellers, the usual glass windows being replaced by wooden shutters intended to conceal the piles of sample-boxes, and the doors capable of being locked from outside with a railway key.

As I emerged from the house, the coachman unlocked the door and held it open.

"How long will the journey take?" I asked, pausing with my foot on the step.

The coachman considered a moment or two and replied:

"It took me, I should say, nigh upon half an hour to get here."

This was pleasant hearing. A half an hour each way and a half an hour at the patient's house. At that rate it would be half-past ten before I was home again, and then it was quite probable that I should find some other untimely messenger waiting on the doorstep. With a muttered anathema on the unknown Mr. Graves and the unrestful life of a locum tenens, I stepped into the uninviting vehicle. Instantly the coachman slammed the door and turned the key, leaving me in total darkness.

One comfort was left to me; my pipe was in my pocket. I made shift to load it in the dark, and, having lit it with a wax match, took the opportunity to inspect the interior of my prison. It was a shabby affair. The moth-eaten state of the blue cloth cushions seemed to suggest that it had been long out of regular use; the oil-cloth floor-covering was worn into holes; ordinary internal fittings there were none. But the appearances suggested that the crazy vehicle had been prepared with considerable forethought for its present use. The inside handles of the doors had apparently been removed; the wooden shutters were permanently fixed in their places; and a paper label, stuck on the transom below each window, had a suspicious appearance of having been put there to cover the painted name and address of the job-master or livery-stable keeper who had originally owned the carriage.

These observations gave me abundant food for reflection. This Mr. Weiss must be an excessively conscientious man if he had considered that his promise to Mr. Graves committed him to such extraordinary precautions. Evidently no mere following of the letter of the law was enough to satisfy his sensitive conscience. Unless he had reasons for sharing Mr. Graves's unreasonable desire for secrecy—for one could not suppose that these measures of concealment had been taken by the patient himself.

The further suggestions that evolved themselves from this consideration were a little disquieting. Whither was I being carried and for what purpose? The idea that I was bound for some den of thieves where I might be robbed and possibly murdered, I dismissed with a smile. Thieves do not make elaborately concerted plans to rob poor devils like me. Poverty has its compensations in that respect. But there were other possibilities. Imagination backed by experience had no difficulty in conjuring up a number of situations in which a medical man might be called upon, with or without coercion, either to witness or actively to participate in the commission of some unlawful act.

Reflections of this kind occupied me pretty actively if not very agreeably during this strange journey. And the monotony was relieved, too, by other distractions. I was, for example, greatly interested to notice how, when one sense is in abeyance, the other senses rouse into a compensating intensity of perception. I sat smoking my pipe in darkness which was absolute save for the dim glow from the smouldering tobacco in the bowl, and seemed to be cut off from all knowledge of the world without. But yet I was not. The vibrations of the carriage, with its hard springs and iron-tired wheels, registered accurately and plainly the character of the roadway. The harsh rattle of granite setts, the soft bumpiness of macadam, the smooth rumble of wood-pavement, the jarring and swerving of crossed tram-lines; all were easily recognizable and together sketched the general features of the neighbourhood through which I was passing. And the sense of hearing filled in the details. Now the hoot of a tug's whistle told of proximity to the river. A sudden and brief hollow reverberation announced the passage under a railway arch (which, by the way, happened several times during the journey); and, when I heard the familiar whistle of a railway-guard followed by the quick snorts of a skidding locomotive, I had as clear a picture of a heavy passenger-train moving out of a station as if I had seen it in broad daylight.

I had just finished my pipe and knocked out the ashes on the heel of my boot, when the carriage slowed down and entered a covered way—as I could tell by the hollow echoes. Then I distinguished the clang of heavy wooden gates closed behind me, and a moment or two later the carriage door was unlocked and opened. I stepped out blinking into a covered passage paved with cobbles and apparently leading down to a mews; but it was all in darkness, and I had no time to make any detailed observations, as the carriage had drawn up opposite a side door which was open and in which stood a woman holding a lighted candle.

"Is that the doctor?" she asked, speaking with a rather pronounced German accent and shading the candle with her hand as she peered at me.

I answered in the affirmative, and she then exclaimed:

"I am glad you have come. Mr. Weiss will be so relieved. Come in, please."

I followed her across a dark passage into a dark room, where she set the candle down on a chest of drawers and turned to depart. At the door, however, she paused and looked back.

"It is not a very nice room to ask you into," she said. "We are very untidy just now, but you must excuse us. We have had so much anxiety about poor Mr. Graves."

"He has been ill some time, then?"

"Yes. Some little time. At intervals, you know. Sometimes better, sometimes not so well."

As she spoke, she gradually backed out into the passage but did not go away at once. I accordingly pursued my inquiries.

"He has not been seen by any doctor, has he?"

"No," she answered, "he has always refused to see a doctor. That has been a great trouble to us. Mr. Weiss has been very anxious about him. He will be so glad to hear that you have come. I had better go and tell him. Perhaps you will kindly sit down until he is able to come to you," and with this she departed on her mission.

It struck me as a little odd that, considering his anxiety and the apparent urgency of the case, Mr. Weiss should not have been waiting to receive me. And when several minutes elapsed without his appearing, the oddness of the circumstance impressed me still more. Having no desire, after the journey in the carriage, to sit down, I whiled away the time by an inspection of the room. And a very curious room it was; bare, dirty, neglected and, apparently, unused. A faded carpet had been flung untidily on the floor. A small, shabby table stood in the middle of the room; and beyond this, three horsehair-covered chairs and a chest of drawers formed the entire set of furniture. No pictures hung on the mouldy walls, no curtains covered the shuttered windows, and the dark drapery of cobwebs that hung from the ceiling to commemorate a long and illustrious dynasty of spiders hinted at months of neglect and disuse.

The chest of drawers—an incongruous article of furniture for what seemed to be a dining-room—as being the nearest and best lighted object received most of my attention. It was a fine old chest of nearly black mahogany, very battered and in the last stage of decay, but originally a piece of some pretensions. Regretful of its fallen estate, I looked it over with some interest and had just observed on its lower corner a little label bearing the printed inscription "Lot 201" when I heard footsteps descending the stairs. A moment later the door opened and a shadowy figure appeared standing close by the threshold.

"Good evening, doctor," said the stranger, in a deep, quiet voice and with a distinct, though not strong, German accent. "I must apologize for keeping you waiting."

I acknowledged the apology somewhat stiffly and asked: "You are Mr. Weiss, I presume?"

"Yes, I am Mr. Weiss. It is very good of you to come so far and so late at night and to make no objection to the absurd conditions that my poor friend has imposed."

"Not at all," I replied. "It is my business to go when and where I am wanted, and it is not my business to inquire into the private affairs of my patients."

"That is very true, sir," he agreed cordially, "and I am much obliged to you for taking that very proper view of the case. I pointed that out to my friend, but he is not a very reasonable man. He is very secretive and rather suspicious by nature."

"So I inferred. And as to his condition; is he seriously ill?"

"Ah," said Mr. Weiss, "that is what I want you to tell me. I am very much puzzled about him."

"But what is the nature of his illness? What does he complain of?"

"He makes very few complaints of any kind although he is obviously ill. But the fact is that he is hardly ever more than half awake. He lies in a kind of dreamy stupor from morning to night."

This struck me as excessively strange and by no means in agreement with the patient's energetic refusal to see a doctor.

"But," I asked, "does he never rouse completely?"

"Oh, yes," Mr. Weiss answered quickly; "he rouses from time to time and is then quite rational, and, as you may have gathered, rather obstinate. That is the peculiar and puzzling feature in the case; this alternation between a state of stupor and an almost normal and healthy condition. But perhaps you had better see him and judge for yourself. He had a rather severe attack just now. Follow me, please. The stairs are rather dark."

The stairs were very dark, and I noticed that they were without any covering of carpet, or even oil-cloth, so that our footsteps resounded dismally as if we were in an empty house. I stumbled up after my guide, feeling my way by the hand-rail, and on the first floor followed him into a room similar in size to the one below and very barely furnished, though less squalid than the other. A single candle at the farther end threw its feeble light on a figure in the bed, leaving the rest of the room in a dim twilight.

As Mr. Weiss tiptoed into the chamber, a woman—the one who had spoken to me below—rose from a chair by the bedside and quietly left the room by a second door. My conductor halted, and looking fixedly at the figure in the bed, called out:

"Philip! Philip! Here is the doctor come to see you."

He paused for a moment or two, and, receiving no answer, said: "He seems to be dozing as usual. Will you go and see what you can make of him?"

I stepped forward to the bedside, leaving Mr. Weiss at the end of the room near the door by which we had entered, where he remained, slowly and noiselessly pacing backwards and forwards in the semi-obscurity. By the light of the candle I saw an elderly man with good features and a refined, intelligent and even attractive face, but dreadfully emaciated, bloodless and sallow. He lay quite motionless except for the scarcely perceptible rise and fall of his chest; his eyes were nearly closed, his features relaxed, and, though he was not actually asleep, he seemed to be in a dreamy, somnolent, lethargic state, as if under the influence of some narcotic.

I watched him for a minute or so, timing his slow breathing by my watch, and then suddenly and sharply addressed him by name; but the only response was a slight lifting of the eyelids, which, after a brief, drowsy glance at me, slowly subsided to their former position.

I now proceeded to make a physical examination. First, I felt his pulse, grasping his wrist with intentional brusqueness in the hope of rousing him from his stupor. The beats were slow, feeble and slightly irregular, giving clear evidence, if any were needed, of his generally lowered vitality. I listened carefully to his heart, the sounds of which were very distinct through the thin walls of his emaciated chest, but found nothing abnormal beyond the feebleness and uncertainty of its action. Then I turned my attention to his eyes, which I examined closely with the aid of the candle and my ophthalmoscope lens, raising the lids somewhat roughly so as to expose the whole of the irises. He submitted without resistance to my rather ungentle handling of these sensitive structures, and showed no signs of discomfort even when I brought the candle-flame to within a couple of inches of his eyes.

But this extraordinary tolerance of light was easily explained by closer examination; for the pupils were contracted to such an extreme degree that only the very minutest point of black was visible at the centre of the grey iris. Nor was this the only abnormal peculiarity of the sick man's eyes. As he lay on his back, the right iris sagged down slightly towards its centre, showing a distinctly concave surface; and, when I contrived to produce a slight but quick movement of the eyeball, a perceptible undulatory movement could be detected. The patient had, in fact, what is known as a tremulous iris, a condition that is seen in cases where the crystalline lens has been extracted for the cure of cataract, or where it has become accidentally displaced, leaving the iris unsupported. In the present case, the complete condition of the iris made it clear that the ordinary extraction operation had not been performed, nor was I able, on the closest inspection with the aid of my lens, to find any trace of the less common "needle operation." The inference was that the patient had suffered from the accident known as "dislocation of the lens"; and this led to the further inference that he was almost or completely blind in the right eye.

This conclusion was, indeed, to some extent negatived by a deep indentation on the bridge of the nose, evidently produced by spectacles, and by marks which I looked for and found behind the ears, corresponding to the hooks or "curl sides" of the glasses. For those spectacles which are fitted with curl sides to hook over the ears are usually intended to be worn habitually, and this agreed with the indentation on the nose; which was deeper than would have been accounted for by the merely occasional use of spectacles for reading. But if only one eye was useful, a single eye-glass would have answered the purpose; not that there was any weight in this objection, for a single eye-glass worn constantly would be much less convenient than a pair of hook-sided spectacles.

As to the nature of the patient's illness, only one opinion seemed possible. It was a clear and typical case of opium or morphine poisoning. To this conclusion all his symptoms seemed to point with absolute certainty. The coated tongue, which he protruded slowly and tremulously in response to a command bawled in his ear; his yellow skin and ghastly expression; his contracted pupils and the stupor from which he could hardly be roused by the roughest handling and which yet did not amount to actual insensibility; all these formed a distinct and coherent group of symptoms, not only pointing plainly to the nature of the drug, but also suggesting a very formidable dose.

But this conclusion in its turn raised a very awkward and difficult question. If a large—a poisonous—dose of the drug had been taken, how, and by whom had that dose been administered? The closest scrutiny of the patient's arms and legs failed to reveal a single mark such as would be made by a hypodermic needle. This man was clearly no common morphinomaniac; and in the absence of the usual sprinkling of needlemarks, there was nothing to show or suggest whether the drug had been taken voluntarily by the patient himself or administered by someone else.

And then there remained the possibility that I might, after all, be mistaken in my diagnosis. I felt pretty confident. But the wise man always holds a doubt in reserve. And, in the present case, having regard to the obviously serious condition of the patient, such a doubt was eminently disturbing. Indeed, as I pocketed my stethoscope and took a last look at the motionless, silent figure, I realized that my position was one of extraordinary difficulty and perplexity. On the one hand my suspicions—aroused, naturally enough, by the very unusual circumstances that surrounded my visit—inclined me to extreme reticence; while, on the other, it was evidently my duty to give any information that might prove serviceable to the patient.

As I turned away from the bed Mr. Weiss stopped his slow pacing to and fro and faced me. The feeble light of the candle now fell on him, and I saw him distinctly for the first time. He did not impress me favourably. He was a thick-set, round-shouldered man, a typical fair German with tow-coloured hair, greased and brushed down smoothly, a large, ragged, sandy beard and coarse, sketchy features. His nose was large and thick with a bulbous end, and inclined to a reddish purple, a tint which extended to the adjacent parts of his face as if the colour had run. His eyebrows were large and beetling, overhanging deep-set eyes, and he wore a pair of spectacles which gave him a somewhat owlish expression. His exterior was unprepossessing, and I was in a state of mind that rendered me easily receptive of an unfavourable impression.

"Well," he said, "what do you make of him?" I hesitated, still perplexed by the conflicting necessities of caution and frankness, but at length replied:

"I think rather badly of him, Mr. Weiss. He is in a very low state."

"Yes, I can see that. But have you come to any decision as to the nature of his illness?"

There was a tone of anxiety and suppressed eagerness in the question which, while it was natural enough in the circumstances, by no means allayed my suspicions, but rather influenced me on the side of caution.

"I cannot give a very definite opinion at present," I replied guardedly. "The symptoms are rather obscure and might very well indicate several different conditions. They might be due to congestion of the brain, and, if no other explanation were possible, I should incline to that view. The alternative is some narcotic poison, such as opium or morphia."

"But that is quite impossible. There is no such drug in the house, and as he never leaves his room now, he could not get any from outside."

"What about the servants?" I asked.

"There are no servants excepting my housekeeper, and she is absolutely trustworthy."

"He might have some store of the drug that you are not aware of. Is he left alone much?"

"Very seldom indeed. I spend as much time with him as I can, and when I am not able to be in the room, Mrs Schallibaum, my housekeeper, sits with him."

"Is he often as drowsy as he is now?"

"Oh, very often; in fact, I should say that is his usual condition. He rouses up now and again, and then he is quite lucid and natural for, perhaps, an hour or so; but presently he becomes drowsy again and doses off, and remains asleep, or half asleep, for hours on end. Do you know of any disease that takes people in that way?"

"No," I answered. "The symptoms are not exactly like those of any disease that is known to me. But they are much very like those of opium poisoning."

"But, my dear sir," Mr. Weiss retorted impatiently, "since it is clearly impossible that it can be opium poisoning, it must be something else. Now, what else can it be? You were speaking of congestion of the brain."

"Yes. But the objection to that is the very complete recovery that seems to take place in the intervals."

"I would not say very complete," said Mr. Weiss. "The recovery is rather comparative. He is lucid and fairly natural in his manner, but he is still dull and lethargic. He does not, for instance, show any desire to go out, or even to leave his room."

I pondered uncomfortably on these rather contradictory statements. Clearly Mr. Weiss did not mean to entertain the theory of opium poisoning; which was natural enough if he had no knowledge of the drug having been used. But still—

"I suppose," said Mr. Weiss, "you have experience of sleeping sickness?"

The suggestion startled me. I had not. Very few people had. At that time practically nothing was known about the disease. It was a mere pathological curiosity, almost unheard of excepting by a few practitioners in remote parts of Africa, and hardly referred to in the text-books. Its connection with the trypanosome-bearing insects was as yet unsuspected, and, to me, its symptoms were absolutely unknown.

"No, I have not," I replied. "The disease is nothing more than a name to me. But why do you ask? Has Mr. Graves been abroad?"