“By George, it’s marvellous!” cried Hopkins, in an ecstasy of admiration. “To think that I had all that evidence in my hand and never knew it! I had intended, however, to go the round of the London opticians.”

“Of course you would. Meanwhile, have you anything more to tell us about the case?”

“Nothing, Mr. Holmes. I think that you know as much as I do now – probably more. We have had inquiries made as to any stranger seen on the country roads or at the railway station. We have heard of none. What beats me is the utter want of all object in the crime. Not a ghost of a motive can anyone suggest.”

“Ah! There I am not in a position to help you. But I suppose you want us to come out tomorrow?”

“If it is not asking too much, Mr. Holmes. There’s a train from Charing Cross to Chatham at six in the morning, and we should be at Yoxley Old Place between eight and nine.”

“Then we shall take it. Your case has certainly some features of great interest, and I shall be delighted to look into it. Well, it’s nearly one, and we had best get a few hours’ sleep. I dare say you can manage all right on the sofa in front of the fire. I’ll light my spirit-lamp and give you a cup of coffee before we start.”

The gale had blown itself out next day, but it was a bitter morning when we started upon our journey. We saw the cold winter sun rise over the dreary marshes of the Thames and the long, sullen reaches of the river, which I shall ever associate with our pursuit of the Andaman Islander in the earlier days of our career. After a long and weary journey we alighted at a small station some miles from Chatham. While a horse was being put into a trap at the local inn we snatched a hurried breakfast, and so we were all ready for business when we at last arrived at Yoxley Old Place.

“Well, Wilson, any news?”

“No, sir, nothing.”

“No reports of any stranger seen?”

“No, sir. Down at the station they are certain that no stranger either came or went yesterday.”

“Have you had inquiries made at inns and lodgings?”

“Yes, sir; there is no one that we cannot account for.”

“Well, it’s only a reasonable walk to Chatham. Anyone might stay there, or take a train without being observed. This is the garden path of which I spoke, Mr. Holmes. I’ll pledge my word there was no mark on it yesterday.”

“On which side were the marks on the grass?”

“This side, sir. This narrow margin of grass between the path and the flower-bed. I can’t see the traces now, but they were clear to me then.”

“Yes, yes; someone has passed along,” said Holmes, stooping over the grass border. “Our lady must have picked her steps carefully, must she not, since on the one side she would leave a track on the path, and on the other an even clearer one on the soft bed?”

“Yes, sir, she must have been a cool hand.”

I saw an intent look pass over Holmes’s face.

“You say that she must have come back this way?”

“Yes, sir; there is no other.”

“On this strip of grass?”

“Certainly, Mr. Holmes.”

“Hum! It was a very remarkable performance – very remarkable. Well, I think we have exhausted the path. Let us go farther. This garden door is usually kept open, I suppose? Then this visitor had nothing to do but to walk in. The idea of murder was not in her mind, or she would have provided herself with some sort of weapon, instead of having to pick this knife off the writing-table. She advanced along this corridor, leaving no traces upon the cocoanut matting. Then she found herself in this study. How long was she there? We have no means of judging.”

Holmes looking at a blood stain on a wall.

“Not more than a few minutes, sir. I forgot to tell you that Mrs. Marker, the housekeeper, had been in there tidying not very long before – about a quarter of an hour, she says.”

“Well, that gives us a limit. Our lady enters this room and what does she do? She goes over to the writing-table. What for? Not for anything in the drawers. If there had been anything worth her taking it would surely have been locked up. No; it was for something in that wooden bureau. Halloa! what is that scratch upon the face of it? Just hold a match, Watson. Why did you not tell me of this, Hopkins?”

The mark which he was examining began upon the brass work on the right-hand side of the keyhole, and extended for about four inches, where it had scratched the varnish from the surface.

“I noticed it, Mr. Holmes. But you’ll always find scratches round a keyhole.”

“This is recent, quite recent. See how the brass shines where it is cut. An old scratch would be the same colour as the surface. Look at it through my lens. There’s the varnish, too, like earth on each side of a furrow. Is Mrs. Marker there?”

A sad-faced, elderly woman came into the room.

“Did you dust this bureau yesterday morning?”

“Yes, sir.”

“Did you notice this scratch?”

“No, sir, I did not.”

“I am sure you did not, for a duster would have swept away these shreds of varnish. Who has the key of this bureau?”

“The Professor keeps it on his watch-chain.”

“Is it a simple key?”

“No, sir; it is a Chubb’s key.”

“Very good. Mrs. Marker, you can go. Now we are making a little progress. Our lady enters the room, advances to the bureau, and either opens it or tries to do so. While she is thus engaged young Willoughby Smith enters the room. In her hurry to withdraw the key she makes this scratch upon the door. He seizes her, and she, snatching up the nearest object, which happens to be this knife, strikes at him in order to make him let go his hold. The blow is a fatal one. He falls and she escapes, either with or without the object for which she has come. Is Susan the maid there? Could anyone have got away through that door after the time that you heard the cry, Susan?”

“No sir; it is impossible. Before I got down the stair I’d have seen anyone in the passage. Besides, the door never opened, for I would have heard it.”

“That settles this exit. Then no doubt the lady went out the way she came. I understand that this other passage leads only to the Professor’s room. There is no exit that way?”

“No, sir.”

“We shall go down it and make the acquaintance of the Professor. Halloa, Hopkins! This is very important, very important indeed. The Professor’s corridor is also lined with cocoanut matting.”

“Well, sir, what of that?”

“Don’t you see any bearing upon the case? Well, well, I don’t insist upon it. No doubt I am wrong. And yet it seems to me to be suggestive. Come with me and introduce me.”

We passed down the passage, which was of the same length as that which led to the garden. At the end was a short flight of steps ending in a door. Our guide knocked, and then ushered us into the Professor’s bedroom.

It was a very large chamber, lined with innumerable volumes, which had overflowed from the shelves and lay in piles in the corners, or were stacked all round at the base of the cases. The bed was in the centre of the room, and in it, propped up with pillows, was the owner of the house. I have seldom seen a more remarkable-looking person. It was a gaunt, aquiline face which was turned towards us, with piercing dark eyes, which lurked in deep hollows under overhung and tufted brows. His hair and beard were white, save that the latter was curiously stained with yellow around his mouth. a cigarette glowed amid the tangle of white hair, and the air of the room was fetid with stale tobacco-smoke. As he held out his hand to Holmes I perceived that it also was stained yellow with nicotine.

“A smoker, Mr. Holmes?” said he, speaking well-chosen English with a curious little mincing accent. “Pray take a cigarette. And you, sir? I can recommend them, for I have them especially prepared by Ionides of Alexandria. He sends me a thousand at a time, and I grieve to say that I have to arrange for a fresh supply every fortnight. Bad, sir, very bad, but an old man has few pleasures. Tobacco and my work – that is all that is left to me.”

Holmes had lit a cigarette, and was shooting little darting glances all over the room.

“Tobacco and my work, but now only tobacco,” the old man exclaimed. “Alas! What a fatal interruption! Who could have foreseen such a terrible catastrophe? So estimable a young man! I assure you that after a few months’ training he was an admirable assistant. What do you think of the matter, Mr. Holmes?”

“I have not yet made up my mind.”

“I shall indeed be indebted to you if you can throw a light where all is so dark to us. To a poor bookworm and invalid like myself such a blow is paralyzing. I seem to have lost the faculty of thought. But you are a man of action – you are a man of affairs. It is part of the everyday routine of your life. You can preserve your balance in every emergency. We are fortunate indeed in having you at our side.”

Holmes was pacing up and down one side of the room whilst the old Professor was talking. I observed that he was smoking with extraordinary rapidity. It was evident that he shared our host’s liking for the fresh Alexandrian cigarettes.

“Yes, sir, it is a crushing blow,” said the old man. “That is my MAGNUM OPUS – the pile of papers on the side table yonder. It is my analysis of the documents found in the Coptic monasteries of Syria and Egypt, a work which will cut deep at the very foundations of revealed religion. With my enfeebled health I do not know whether I shall ever be able to complete it now that my assistant has been taken from me. Dear me, Mr. Holmes; why, you are even a quicker smoker than I am myself.”

Holmes smiled.

“I am a connoisseur,” said he, taking another cigarette from the box – his fourth – and lighting it from the stub of that which he had finished. “I will not trouble you with any lengthy cross-examination, Professor Coram, since I gather that you were in bed at the time of the crime and could know nothing about it. I would only ask this. What do you imagine that this poor fellow meant by his last words: ‘The Professor – it was she’?”

The Professor shook his head.

“Susan is a country girl,” said he, “and you know the incredible stupidity of that class. I fancy that the poor fellow murmured some incoherent delirious words, and that she twisted them into this meaningless message.”

“I see. You have no explanation yourself of the tragedy?”

“Possibly an accident; possibly – I only breathe it among ourselves – a suicide. Young men have their hidden troubles – some affair of the heart, perhaps, which we have never known. It is a more probable supposition than murder.”

“But the eyeglasses?”

“Ah! I am only a student – a man of dreams. I cannot explain the practical things of life. But still, we are aware, my friend, that love-gages may take strange shapes. By all means take another cigarette. It is a pleasure to see anyone appreciate them so. a fan, a glove, glasses – who knows what article may be carried as a token or treasured when a man puts an end to his life? This gentleman speaks of footsteps in the grass; but, after all, it is easy to be mistaken on such a point. As to the knife, it might well be thrown far from the unfortunate man as he fell. It is possible that I speak as a child, but to me it seems that Willoughby Smith has met his fate by his own hand.”

Holmes seemed struck by the theory thus put forward, and he continued to walk up and down for some time, lost in thought and consuming cigarette after cigarette.

“Tell me, Professor Coram,” he said, at last, “what is in that cupboard in the bureau?”

“Nothing that would help a thief. Family papers, letters from my poor wife, diplomas of Universities which have done me honour. Here is the key. You can look for yourself.”

Holmes picked up the key and looked at it for an instant; then he handed it back.

“No; I hardly think that it would help me,” said he. “I should prefer to go quietly down to your garden and turn the whole matter over in my head. There is something to be said for the theory of suicide which you have put forward. We must apologize for having intruded upon you, Professor Coram, and I promise that we won’t disturb you until after lunch. At two o’clock we will come again and report to you anything which may have happened in the interval.”

Holmes was curiously distrait, and we walked up and down the garden path for some time in silence.

“Have you a clue?” I asked, at last.

“It depends upon those cigarettes that I smoked,” said he. “It is possible that I am utterly mistaken. The cigarettes will show me.”

“My dear Holmes,” I exclaimed, “how on earth –”

“Well, well, you may see for yourself. If not, there’s no harm done. Of course, we always have the optician clue to fall back upon, but I take a shortcut when I can get it. Ah, here is the good Mrs. Marker! Let us enjoy five minutes of instructive conversation with her.”

I may have remarked before that Holmes had, when he liked, a peculiarly ingratiating way with women, and that he very readily established terms of confidence with them. In half the time which he had named he had captured the housekeeper’s goodwill, and was chatting with her as if he had known her for years.

“Yes, Mr. Holmes, it is as you say, sir. He does smoke something terrible. All day and sometimes all night, sir. I’ve seen that room of a morning – well, sir, you’d have thought it was a London fog. Poor young Mr. Smith, he was a smoker also, but not as bad as the Professor. His health – well, I don’t know that it’s better nor worse for the smoking.”

“Ah!” said Holmes, “but it kills the appetite.”

“Well, I don’t know about that, sir.”

“I suppose the Professor eats hardly anything?”

“Well, he is variable. I’ll say that for him.”

“I’ll wager he took no breakfast this morning, and won’t face his lunch after all the cigarettes I saw him consume.”

“Well, you’re out there, sir, as it happens, for he ate a remarkable big breakfast this morning. I don’t know when I’ve known him make a better one, and he’s ordered a good dish of cutlets for his lunch. I’m surprised myself, for since I came into that room yesterday and saw young Mr. Smith lying there on the floor I couldn’t bear to look at food. Well, it takes all sorts to make a world, and the Professor hasn’t let it take his appetite away.”

We loitered the morning away in the garden. Stanley Hopkins had gone down to the village to look into some rumours of a strange woman who had been seen by some children on the Chatham Road the previous morning. As to my friend, all his usual energy seemed to have deserted him. I had never known him handle a case in such a half-hearted fashion. Even the news brought back by Hopkins that he had found the children and that they had undoubtedly seen a woman exactly corresponding with Holmes’s description, and wearing either spectacles or eyeglasses, failed to rouse any sign of keen interest. He was more attentive when Susan, who waited upon us at lunch, volunteered the information that she believed Mr. Smith had been out for a walk yesterday morning, and that he had only returned half an hour before the tragedy occurred. I could not myself see the bearing of this incident, but I clearly perceived that Holmes was weaving it into the general scheme which he had formed in his brain. Suddenly he sprang from his chair and glanced at his watch. “Two o’clock, gentlemen,” said he. “We must go up and have it out with our friend the Professor.”

The old man had just finished his lunch, and certainly his empty dish bore evidence to the good appetite with which his housekeeper had credited him. He was, indeed, a weird figure as he turned his white mane and his glowing eyes towards us. The eternal cigarette smouldered in his mouth. He had been dressed and was seated in an arm-chair by the fire.

“Well, Mr. Holmes, have you solved this mystery yet?” He shoved the large tin of cigarettes which stood on a table beside him towards my companion. Holmes stretched out his hand at the same moment, and between them they tipped the box over the edge. For a minute or two we were all on our knees retrieving stray cigarettes from impossible places. When we rose again I observed that Holmes’s eyes were shining and his cheeks tinged with colour. Only at a crisis have I seen those battle-signals flying.

“Yes,” said he, “I have solved it.”

Stanley Hopkins and I stared in amazement. Something like a sneer quivered over the gaunt features of the old Professor.

“Indeed! In the garden?”

“No, here.”

“Here! When?”

“This instant.”

“You are surely joking, Mr. Sherlock Holmes. You compel me to tell you that this is too serious a matter to be treated in such a fashion.”

“I have forged and tested every link of my chain, Professor Coram, and I am sure that it is sound. What your motives are or what exact part you play in this strange business I am not yet able to say. In a few minutes I shall probably hear it from your own lips. Meanwhile I will reconstruct what is past for your benefit, so that you may know the information which I still require.

“A lady yesterday entered your study. She came with the intention of possessing herself of certain documents which were in your bureau. She had a key of her own. I have had an opportunity of examining yours, and I do not find that slight discolouration which the scratch made upon the varnish would have produced. You were not an accessory, therefore, and she came, so far as I can read the evidence, without your knowledge to rob you.”

The Professor blew a cloud from his lips. “This is most interesting and instructive,” said he. “Have you no more to add? Surely, having traced this lady so far, you can also say what has become of her.”

“I will endeavour to do so. In the first place she was seized by your secretary, and stabbed him in order to escape. This catastrophe I am inclined to regard as an unhappy accident, for I am convinced that the lady had no intention of inflicting so grievous an injury. An assassin does not come unarmed. Horrified by what she had done she rushed wildly away from the scene of the tragedy. Unfortunately for her she had lost her glasses in the scuffle, and as she was extremely short-sighted she was really helpless without them. She ran down a corridor, which she imagined to be that by which she had come – both were lined with cocoanut matting – and it was only when it was too late that she understood that she had taken the wrong passage and that her retreat was cut off behind her. What was she to do? She could not go back. She could not remain where she was. She must go on. She went on. She mounted a stair, pushed open a door, and found herself in your room.”