The two detectives shook their heads.

“Well, Mr. Holmes, if this is true, we only tumble out of one mystery into another,” said the London inspector.

“And in some ways a worse one,” added White Mason. “The lady has never been in America in all her life. What possible connection could she have with an American assassin which would cause her to shelter him?”

“I freely admit the difficulties,” said Holmes. “I propose to make a little investigation of my own to-night, and it is just possible that it may contribute something to the common cause.”

“Can we help you, Mr. Holmes?”

“No, no! Darkness and Dr. Watson’s umbrella — my wants are simple. And Ames, the faithful Ames, no doubt he will stretch a point for me. All my lines of thought lead me back invariably to the one basic question — why should an athletic man develop his frame upon so unnatural an instrument as a single dumb-bell?”

It was late that night when Holmes returned from his solitary excursion. We slept in a double-bedded room, which was the best that the little country inn could do for us. I was already asleep when I was partly awakened by his entrance.

“Well, Holmes,” I murmured, “have you found anything out?”

He stood beside me in silence, his candle in his hand. Then the the tall, lean figure inclined towards me. “I say, Watson,” he whispered, “would you be afraid to sleep in the same room with a lunatic, a man with softening of the brain, an idiot whose mind has lost its grip?”

“Not in the least,” I answered in astonishment.

“Ah, that’s lucky,” he said, and not another word would he utter that night.

Next morning, after breakfast, we found Inspector MacDonald and White Mason seated in close consultation in the small parlour of the local police sergeant. On the table in front of them were piled a number of letters and telegrams, which they were carefully sorting and docketing. Three had been placed on one side.

“Still on the track of the elusive bicyclist?” Holmes asked cheerfully. “What is the latest news of the ruffian?”

MacDonald pointed ruefully to his heap of correspondence.

“He is at present reported from Leicester, Nottingham, Southampton, Derby, East Ham, Richmond, and fourteen other places. In three of them — East Ham, Leicester, and Liverpool — there is a clear case against him, and he has actually been arrested. The country seems to be full of the fugitives with yellow coats.”

“Dear me!” said Holmes sympathetically. “Now, Mr. Mac and you, Mr. White Mason, I wish to give you a very earnest piece of advice. When I went into this case with you I bargained, as you will no doubt remember, that I should not present you with half-proved theories, but that I should retain and work out my own ideas until I had satisfied myself that they were correct. For this reason I am not at the present moment telling you all that is in my mind. On the other hand, I said that I would play the game fairly by you, and I do not think it is a fair game to allow you for one unnecessary moment to waste your energies upon a profitless task. Therefore I am here to advise you this morning, and my advice to you is summed up in three words — abandon the case.”

I did not pause to argue over this atrocious sentiment.

“I shall be back in an hour or two,” I remarked.

“All right! Good luck! But, I say, if you are crossing the river you may as well return Toby, for I don’t think it is at all likely that we shall have any use for him now.”

I took our mongrel accordingly and left him, together with a half-sovereign, at the old naturalist’s in Pinchin Lane. At Camberwell I found Miss Morstan a little weary after her night’s adventures but very eager to hear the news. Mrs. Forrester, too, was full of curiosity. I told them all that we had done, suppressing, however, the more dreadful parts of the tragedy. Thus although I spoke of Mr. Sholto’s death, I said nothing of the exact manner and method of it. With all my omissions, however, there was enough to startle and amaze them.

“It is a romance!” cried Mrs. Forrester. “An injured lady, half a million in treasure, a black cannibal, and a wooden-legged ruffian. They take the place of the conventional dragon or wicked earl.”

“And two knight-errants to the rescue,” added Miss Morstan with a bright glance at me.

“Why, Mary, your fortune depends upon the issue of this search. I don’t think that you are nearly excited enough. Just imagine what it must be to be so rich and to have the world at your feet!”

It sent a little thrill of joy to my heart to notice that she showed no sign of elation at the prospect. On the contrary, she gave a toss of her proud head, as though the matter were one in which she took small interest.

“It is for Mr. Thaddeus Sholto that I am anxious,” she said. “Nothing else is of any consequence; but I think that he has behaved most kindly and honourably throughout. It is our duty to clear him of this dreadful and unfounded charge.”

It was evening before I left Camberwell, and quite dark by the time I reached home. My companion’s book and pipe lay by his chair, but he had disappeared. I looked about in the hope of seeing a note, but there was none.

“I suppose that Mr. Sherlock Holmes has gone out,” I said to Mrs. Hudson as she came up to lower the blinds.

“No, sir. He has gone to his room, sir. Do you know, sir,” sinking her voice into an impressive whisper, “I am afraid for his health.”

“Why so, Mrs. Hudson?”

“Well, he’s that strange, sir. After you was gone he walked and he walked, up and down, and up and down, until I was weary of the sound of his footstep. Then I heard him talking to himself and muttering, and every time the bell rang out he came on the stairhead, with ‘What is that, Mrs. Hudson?’ And now he has slammed off to his room, but I can hear him walking away the same as ever. I hope he’s not going to be ill, sir. I ventured to say something to him about cooling medicine, but he turned on me, sir, with such a look that I don’t know how ever I got out of the room.”