She spoke sharply and in an unnecessarily high tone so that the patient could not fail to hear. Apparently he took in the very broad hint contained in the concluding sentence, for he trudged wearily and unsteadily up and down the room for some time without speaking, though he continued to look at me from time to time as if something in my appearance puzzled him exceedingly. At length his intolerable longing for repose overcame his politeness and he returned to the attack.

"Surely v' walked enough now. Feeling very tired. Am really. Would you be s'kind 's t'let me lie down few minutes?"

"Don't you think he might lie down for a little while?" Mrs. Schallibaum asked.

I felt his pulse, and decided that he was really becoming fatigued, and that it would be wiser not to overdo the exercise while he was so weak. Accordingly, I consented to his returning to bed, and turned him round in that direction; whereupon he tottered gleefully towards his resting-place like a tired horse heading for its stable.

As soon as he was tucked in, I gave him a full cup of coffee, which he drank with some avidity as if thirsty. Then I sat down by the bedside, and, with a view to keeping him awake, began once more to ply him with questions.

"Does your head ache, Mr. Graves?" I asked.

"The doctor says 'does your head ache?'" Mrs. Schallibaum squalled, so loudly that the patient started perceptibly.

"I heard him, m'dear girl," he answered with a faint smile. "Not deaf you know. Yes. Head aches a good deal. But I thing this gennleman mistakes—"

"He says you are to keep awake. You mustn't go to sleep again, and you are not to close your eyes."

"All ri' Pol'n. Keep'm open," and he proceeded forthwith to shut them with an air of infinite peacefulness. I grasped his hand and shook it gently, on which he opened his eyes and looked at me sleepily. The housekeeper stroked his head, keeping her face half-turned from me—as she had done almost constantly, to conceal the squinting eye, as I assumed—and said:

"Need we keep you any longer, doctor? It is getting very late and you have a long way to go."

I looked doubtfully at the patient. I was loath to leave him, distrusting these people as I did. But I had my work to do on the morrow, with, perhaps, a night call or two in the interval, and the endurance even of a general practitioner has its limits.

"I think I heard the carriage some time ago," Mrs. Schallibaum added.

I rose hesitatingly and looked at my watch. It had turned half-past eleven.

"You understand," I said in a low voice, "that the danger is not over? If he is left now he will fall asleep, and in all human probability will never wake. You clearly understand that?"

"Yes, quite clearly. I promise you he shall not be allowed to fall asleep again."

As she spoke, she looked me full in the face for a few moments, and I noted that her eyes had a perfectly normal appearance, without any trace whatever of a squint.

"Very well," I said. "On that understanding I will go now; and I shall hope to find our friend quite recovered at my next visit."

I turned to the patient, who was already dozing, and shook his hand heartily.

"Good-bye, Mr. Graves!" I said. "I am sorry to have to disturb your repose so much; but you must keep awake, you know. Won't do to go to sleep."

"Ver' well," he replied drowsily. "Sorry t' give you all this trouble. L' keep awake. But I think you're mistak'n—"

"He says it's very important that you shouldn't go to sleep, and that I am to see that you don't. Do you understand?"

"Yes, I un'stan'. But why does this gennlem'n—?"

"Now it's of no use for you to ask a lot of questions," Mrs. Schallibaum said playfully; "we'll talk to you to-morrow. Good night, doctor. I'll light you down the stairs, but I won't come down with you, or the patient will be falling asleep again."

Taking this definite dismissal, I retired, followed by a dreamily surprised glance from the sick man. The housekeeper held the candle over the balusters until I reached the bottom of the stairs, when I perceived through the open door along the passage a glimmer of light from the carriage lamps. The coachman was standing just outside, faintly illuminated by the very dim lamplight, and as I stepped into the carriage he remarked in his Scotch dialect that I "seemed to have been makin' a nicht of it." He did not wait for any reply—none being in fact needed—but shut the door and locked it.

I lit my little pocket-lamp and hung it on the back cushion. I even drew the board and notebook from my pocket. But it seemed rather unnecessary to take a fresh set of notes, and, to tell the truth, I rather shirked the labour, tired as I was after my late exertions; besides, I wanted to think over the events of the evening, while they were fresh in my memory. Accordingly I put away the notebook, filled and lighted my pipe, and settled myself to review the incidents attending my second visit to this rather uncanny house.

Considered in leisurely retrospect, that visit offered quite a number of problems that called for elucidation. There was the patient's condition, for instance. Any doubt as to the cause of his symptoms was set at rest by the effect of the antidotes. Mr. Graves was certainly under the influence of morphine, and the only doubtful question was how he had become so. That he had taken the poison himself was incredible. No morphinomaniac would take such a knock-down dose. It was practically certain that the poison had been administered by someone else, and, on Mr. Weiss's own showing, there was no one but himself and the housekeeper who could have administered it. And to this conclusion all the other very queer circumstances pointed.

What were these circumstances? They were, as I have said, numerous, though many of them seemed trivial. To begin with, Mr. Weiss's habit of appearing some time after my arrival and disappearing some time before my departure was decidedly odd. But still more odd was his sudden departure this evening on what looked like a mere pretext. That departure coincided in time with the sick man's recovery of the power of speech. Could it be that Mr. Weiss was afraid that the half-conscious man might say something compromising to him in my presence? It looked rather like it. And yet he had gone away and left me with the patient and the housekeeper.

But when I came to think about it I remembered that Mrs. Schallibaum had shown some anxiety to prevent the patient from talking. She had interrupted him more than once, and had on two occasions broken in when he seemed to be about to ask me some question. I was "mistaken" about something. What was that something that he wanted to tell me?

It had struck me as singular that there should be no coffee in the house, but a sufficiency of tea. Germans are not usually tea-drinkers and they do take coffee. But perhaps there was nothing in this. Rather more remarkable was the invisibility of the coachman. Why could he not be sent to fetch the coffee, and why did not he, rather than the housekeeper, come to take the place of Mr. Weiss when the latter had to go away.

There were other points, too. I recalled the word that sounded like "Pol'n," which Mr. Graves had used in speaking to the housekeeper. Apparently it was a Christian name of some kind; but why did Mr. Graves call the woman by her Christian name when Mr. Weiss addressed her formally as Mrs. Schallibaum? And, as to the woman herself: what was the meaning of that curious disappearing squint? Physically it presented no mystery. The woman had an ordinary divergent squint, and, like many people, who suffer from this displacement, could, by a strong muscular effort, bring the eyes temporarily into their normal parallel position. I had detected the displacement when she had tried to maintain the effort too long, and the muscular control had given way. But why had she done it? Was it only feminine vanity—mere sensitiveness respecting a slight personal disfigurement? It might be so; or there might be some further motive. It was impossible to say.

Turning this question over, I suddenly remembered the peculiarity of Mr. Weiss's spectacles. And here I met with a real poser. I had certainly seen through those spectacles as clearly as if they had been plain window-glass; and they had certainly given an inverted reflection of the candle-flame like that thrown from the surface of a concave lens. Now they obviously could not be both flat and concave; but yet they had the properties peculiar to both flatness and concavity. And there was a further difficulty. If I could see objects unaltered through them, so could Mr. Weiss. But the function of spectacles is to alter the appearances of objects, by magnification, reduction or compensating distortion. If they leave the appearances unchanged they are useless. I could make nothing of it. After puzzling over it for quite a long time, I had to give it up; which I did the less unwillingly inasmuch as the construction of Mr. Weiss's spectacles had no apparent bearing on the case.

On arriving home, I looked anxiously at the message-book, and was relieved to find that there were no further visits to be made. Having made up a mixture for Mr. Graves and handed it to the coachman, I raked the ashes of the surgery fire together and sat down to smoke a final pipe while I reflected once more on the singular and suspicious case in which I had become involved. But fatigue soon put an end to my meditations; and having come to the conclusion that the circumstances demanded a further consultation with Thorndyke, I turned down the gas to a microscopic blue spark and betook myself to bed.

Chapter IV

The Official View

I rose on the following morning still possessed by the determination to make some oportunity during the day to call on Thorndyke and take his advice on the now urgent question as to what I was to do. I use the word "urgent" advisedly; for the incidents of the preceding evening had left me with the firm conviction that poison was being administered for some purpose to my mysterious patient, and that no time must be lost if his life was to be saved. Last night he had escaped only by the narrowest margin—assuming him to be still alive—and it was only my unexpectedly firm attitude that had compelled Mr. Weiss to agree to restorative measures.

That I should be sent for again I had not the slightest expectation. If what I so strongly suspected was true, Weiss would call in some other doctor, in the hope of better luck, and it was imperative that he should be stopped before it was too late. This was my view, but I meant to have Thorndyke's opinion, and act under his direction, but

"The best laid plans of mice and men Gang aft agley."

When I came downstairs and took a preliminary glance at the rough memorandum-book, kept by the bottle-boy, or, in his absence, by the housemaid, I stood aghast. The morning's entries looked already like a sample page of the Post Office directory. The new calls alone were more than equal to an ordinary day's work, and the routine visits remained to be added. Gloomily wondering whether the Black Death had made a sudden reappearance in England, I hurried to the dining-room and made a hasty breakfast, interrupted at intervals by the apparition of the bottle-boy to announce new messages.

The first two or three visits solved the mystery. An epidemic of influenza had descended on the neighbourhood, and I was getting not only our own normal work but a certain amount of overflow from other practices. Further, it appeared that a strike in the building trade had been followed immediately by a widespread failure of health among the bricklayers who were members of a certain benefit club; which accounted for the remarkable suddenness of the outbreak.

Of course, my contemplated visit to Thorndyke was out of the question. I should have to act on my own responsibility. But in the hurry and rush and anxiety of the work—for some of the cases were severe and even critical—I had no opportunity to consider any course of action, nor time to carry it out. Even with the aid of a hansom which I chartered, as Stillbury kept no carriage, I had not finished my last visit until near on midnight, and was then so spent with fatigue that I fell asleep over my postponed supper.

As the next day opened with a further increase of work, I sent a telegram to Dr. Stillbury at Hastings, whither he had gone, like a wise man, to recruit after a slight illness. I asked for authority to engage an assistant, but the reply informed me that Stillbury himself was on his way to town; and to my relief, when I dropped in at the surgery for a cup of tea, I found him rubbing his hands over the open day-book.

"It's an ill wind that blows nobody good," he remarked cheerfully as we shook hands. "This will pay the expenses of my holiday, including you. By the way, you are not anxious to be off, I suppose?"

As a matter of fact, I was; for I had decided to accept Thorndyke's offer, and was now eager to take up my duties with him. But it would have been shabby to leave Stillbury to battle alone with this rush of work or to seek the services of a strange assistant.

"I should like to get off as soon as you can spare me," I replied, "but I'm not going to leave you in the lurch."

"That's a good fellow," said Stillbury. "I knew you wouldn't. Let us have some tea and divide up the work. Anything of interest going?"

There were one or two unusual cases on the list, and, as we marked off our respective patients, I gave him the histories in brief synopsis. And then I opened the subject of my mysterious experiences at the house of Mr. Weiss.

"There's another affair that I want to tell you about; rather an unpleasant business."

"Oh, dear!" exclaimed Stillbury. He put down his cup and regarded me with quite painful anxiety.

"It looks to me like an undoubted case of criminal poisoning," I continued.

Stillbury's face cleared instantly. "Oh, I'm glad it's nothing more than that," he said with an air of relief. "I was afraid, it was some confounded woman. There's always that danger, you know, when a locum is young and happens—if I may say so, Jervis—to be a good-looking fellow. Let us hear about this case."

I gave him a condensed narrative of my connection with the mysterious patient, omitting any reference to Thorndyke, and passing lightly over my efforts to fix the position of the house, and wound up with the remark that the facts ought certainly to be communicated to the police.

"Yes," he admitted reluctantly, "I suppose you're right. Deuced unpleasant though. Police cases don't do a practice any good. They waste a lot of time, too; keep you hanging about to give evidence. Still, you are quite right. We can't stand by and see the poor devil poisoned without making some effort. But I don't believe the police will do anything in the matter."

"Don't you really?"

"No, I don't. They like to have things pretty well cut and dried before they act. A prosecution is an expensive affair, so they don't care to prosecute unless they are fairly sure of a conviction. If they fail they get hauled over the coals."

"But don't you think they would get a conviction in this case?"

"Not on your evidence, Jervis. They might pick up something fresh, but, if they didn't they would fail. You haven't got enough hard-baked facts to upset a capable defence. Still, that isn't our affair. You want to put the responsibility on the police and I entirely agree with you."

"There ought not to be any delay," said I.

"There needn't be. I shall look in on Mrs. Wackford and you have to see the Rummel children; we shall pass the station on our way. Why shouldn't we drop in and see the inspector or superintendent?"

The suggestion met my views exactly. As soon as we had finished tea, we set forth, and in about ten minutes found ourselves in the bare and forbidding office attached to the station.

The presiding officer descended from a high stool, and, carefully laying down his pen, shook hands cordially.

"And what can I do for you gentlemen?" he asked, with an affable smile.

Stillbury proceeded to open our business.

"My friend here, Dr. Jervis, who has very kindly been looking after my work for a week or two, has had a most remarkable experience, and he wants to tell you about it."

"Something in my line of business?" the officer inquired.

"That," said I, "is for you to judge. I think it is, but you may think otherwise"; and hereupon, without further preamble, I plunged into the history of the case, giving him a condensed statement similar to that which I had already made to Stillbury.

He listened with close attention, jotting down from time to time a brief note on a sheet of paper; and, when I had finished, he wrote out in a black-covered notebook a short précis of my statement.

"I have written down here," he said, "the substance of what you have told me. I will read the deposition over to you, and, if it is correct, I will ask you to sign it."

He did so, and, when I had signed the document, I asked him what was likely to be done in the matter.

"I am afraid," he replied, "that we can't take any active measures. You have put us on our guard and we shall keep our eyes open. But I think that is all we can do, unless we hear something further."

"But," I exclaimed, "don't you think that it is a very suspicious affair?"

"I do," he replied. "A very fishy business indeed, and you were quite right to come and tell us about it."

"It seems a pity not to take some measures," I said. "While you are waiting to hear something further, they may give the poor wretch a fresh dose and kill him."

"In which case we should hear something further, unless some fool of a doctor were to give a death certificate."

"But that is very unsatisfactory. The man ought not to be allowed to die."

"I quite agree with you, sir. But we've no evidence that he is going to die. His friends sent for you, and you treated him skilfully and left him in a fair way to recovery. That's all that we really know about it. Yes, I know," the officer continued as I made signs of disagreement, "you think that a crime is possibly going to be committed and that we ought to prevent it. But you overrate our powers. We can only act on evidence that a crime has actually been committed or is actually being attempted. Now we have no such evidence. Look at your statement, and tell me what you can swear to."

"I think I could swear that Mr. Graves had taken a poisonous dose of morphine."

"And who gave him that poisonous dose?"

"I very strongly suspect—"

"That's no good, sir," interrupted the officer. "Suspicion isn't evidence. We should want you to swear an information and give us enough facts to make out a primâ facie case against some definite person. And you couldn't do it. Your information amounts to this: that a certain person has taken a poisonous dose of morphine and apparently recovered. That's all. You can't swear that the names given to you are real names, and you can't give us any address or even any locality."

"I took some compass bearings in the carriage," I said. "You could locate the house, I think, without much difficulty."

The officer smiled faintly and fixed an abstracted gaze on the clock.

"You could, sir," he replied. "I have no doubt whatever that you could. I couldn't. But, in any case, we haven't enough to go upon. If you learn anything fresh, I hope you will let me know; and I am very much obliged to you for taking so much trouble in the matter. Good evening sir. Good evening, Dr. Stillbury."

He shook hands with us both genially, and, accepting perforce this very polite but unmistakable dismissal, we took our departure.

Outside the station, Stillbury heaved a comfortable sigh. He was evidently relieved to find that no upheavals were to take place in his domain.

"I thought that would be their attitude," he said, "and they are quite right, you know. The function of law is to prevent crime, it is true; but prophylaxis in the sense in which we understand it is not possible in legal practice."

I assented without enthusiasm. It was disappointing to find that no precautionary measures were to be taken. However, I had done all that I could in the matter. No further responsibility lay upon me, and, as it was practically certain that I had seen and heard the last of Mr. Graves and his mysterious household, I dismissed the case from my mind. At the next corner Stillbury and I parted to go our respective ways; and my attention was soon transferred from the romance of crime to the realities of epidemic influenza.

The plethora of work in Dr. Stillbury's practice continued longer than I had bargained for. Day after day went by and still found me tramping the dingy streets of Kennington or scrambling up and down narrow stairways; turning in at night dead tired, or turning out half awake to the hideous jangle of the night bell.

It was very provoking. For months I had resisted Thorndyke's persuasion to give up general practice and join him. Not from lack of inclination, but from a deep suspicion that he was thinking of my wants rather than his own; that his was a charitable rather than a business proposal. Now that I knew this not to be the case, I was impatient to join him; and, as I trudged through the dreary thoroughfares of this superannuated suburb, with its once rustic villas and its faded gardens, my thoughts would turn enviously to the quiet dignity of the Temple and my friend's chambers in King's Bench Walk.

The closed carriage appeared no more; nor did any whisper either of good or evil reach me in connection with the mysterious house from which it had come. Mr. Graves had apparently gone out of my life for ever.

But if he had gone out of my life, he had not gone out of my memory. Often, as I walked my rounds, would the picture of that dimly-lit room rise unbidden. Often would I find myself looking once more into that ghastly face, so worn, so wasted and haggard, and yet so far from repellent. All the incidents of that last night would reconstitute themselves with a vividness that showed the intensity of the impression that they had made at the time. I would have gladly forgotten the whole affair, for every incident of it was fraught with discomfort. But it clung to my memory; it haunted me; and ever as it returned it bore with it the disquieting questions: Was Mr. Graves still alive? And, if he was not, was there really nothing which could have been done to save him?

Nearly a month passed before the practice began to show signs of returning to its normal condition. Then the daily lists became more and more contracted and the day's work proportionately shorter. And thus the term of my servitude came to an end. One evening, as we were writing up the day-book, Stillbury remarked:

"I almost think, Jervis, I could manage by myself now. I know you are only staying on for my sake."

"I am staying on to finish my engagement, but I shan't be sorry to clear out if you can do without me."

"I think I can. When would you like to be off?"

"As soon as possible. Say to-morrow morning, after I have made a few visits and transferred the patients to you."

"Very well," said Stillbury. "Then I will give you your cheque and settle up everything to-night, so that you shall be free to go off when you like to-morrow morning."

Thus ended my connection with Kennington Lane. On the following day at about noon, I found myself strolling across Waterloo Bridge with the sensations of a newly liberated convict and a cheque for twenty-five guineas in my pocket. My luggage was to follow when I sent for it. Now, unhampered even by a hand-bag, I joyfully descended the steps at the north end of the bridge and headed for King's Bench Walk by way of the Embankment and Middle Temple Lane.