"Cyanea!" I cried. "Cyanea! Behold the Lion's Mane!"

The strange object at which I pointed did indeed look like a tangled mass torn from the mane of a lion. It lay upon a rocky shelf some three feet under the water, a curious waving, vibrating, hairy creature with streaks of silver among its yellow tresses. It pulsated with a slow, heavy dilation and contraction.

"It has done mischief enough. Its day is over!" I cried. "Help me, Stackhurst! Let us end the murderer forever."

There was a big boulder just above the ledge, and we pushed it until it fell with a tremendous splash into the water. When the ripples had cleared we saw that it had settled upon the ledge below. One flapping edge of yellow membrane showed that our victim was beneath it. A thick oily scum oozed out from below the stone and stained the water round, rising slowly to the surface.

"Well, this gets me!" cried the inspector. "What was it, Mr. Holmes? I'm born and bred in these parts, but I never saw such a thing. It don't belong to Sussex."

"Just as well for Sussex," I remarked. "It may have been the southwest gale that brought it up. Come back to my house, both of you, and I will give you the terrible experience of one who has good reason to remember his own meeting with the same peril of the seas."

When we reached my study we found that Murdoch was so far recovered that he could sit up. He was dazed in mind, and every now and then was shaken by a paroxysm of pain. In broken words he explained that he had no notion what had occurred to him, save that terrific pangs had suddenly shot through him, and that it had taken all his fortitude to reach the bank.

"Here is a book," I said, taking up the little volume, "which first brought light into what might have been forever dark. It is Out of Doors, by the famous observer, J. G. Wood. Wood himself very nearly perished from contact with this vile creature, so he wrote with a very full knowledge. Cyanea capillata is the miscreant's full name, and he can be as dangerous to life as, and far more painful than, the bite of the cobra. Let me briefly give this extract.

"If the bather should see a loose roundish mass of tawny

membranes and fibers, something like very large handfuls

of lion's mane and silver paper, let him beware, for this is

the fearful stinger, Cyanea capillata.

Could our sinister acquaintance be more clearly described?

"He goes on to tell of his own encounter with one when swimming off the coast of Kent. He found that the creature radiated almost invisible filaments to the distance of fifty feet, and that anyone within that circumference from the deadly center was in danger of death. Even at a distance the effect upon Wood was almost fatal.

"The multitudinous threads caused light scarlet lines upon

the skin which on closer examination resolved into minute

dots or pustules, each dot charged as it were with a red-hot

needle making its way through the nerves.

"The local pain was, as he explains, the least part of the exquisite torment.

"Pangs shot through the chest, causing me to fall as if

struck by a bullet. The pulsation would cease, and then the

heart would give six or seven leaps as if it would force its

way through the chest.

"It nearly killed him, although he had only been exposed to it in the disturbed ocean and not in the narrow calm waters of a bathing-pool. He says that he could hardly recognize himself afterwards, so white, wrinkled and shriveled was his face. He gulped down brandy, a whole bottleful, and it seems to have saved his life. There is the book, Inspector. I leave it with you, and you cannot doubt that it contains a full explanation of the tragedy of poor McPherson."

"And incidentally exonerates me," remarked Ian Murdoch with a wry smile. "I do not blame you, Inspector, nor you, Mr. Holmes, for your suspicions were natural. I feel that on the very eve of my arrest I have only cleared myself by sharing the fate of my poor friend."

"No, Mr. Murdoch. I was already upon the track, and had I been out as early as I intended I might well have saved you from this terrific experience."

"But how did you know, Mr. Holmes?"

"I am an omnivorous reader with a strangely retentive memory for trifles. That phrase 'the Lion's Mane' haunted my mind. I knew that I had seen it somewhere in an unexpected context. You have seen that it does describe the creature. I have no doubt that it was floating on the water when McPherson saw it, and that this phrase was the only one by which he could convey to us a warning as to the creature which had been his death."

"Then I, at least, am cleared," said Murdoch, rising slowly to his feet. "There are one or two words of explanation which I should give, for I know the direction in which your inquiries have run. It is true that I loved this lady, but from the day when she chose my friend McPherson my one desire was to help her to happiness. I was well content to stand aside and act as their go-between. Often I carried their messages, and it was because I was in their confidence and because she was so dear to me that I hastened to tell her of my friend's death, lest someone should forestall me in a more sudden and heartless manner. She would not tell you, sir, of our relations lest you should disapprove and I might suffer. But with your leave I must try to get back to The Gables, for my bed will be very welcome."

Stackhurst held out his hand. "Our nerves have all been at concert-pitch," said he. "Forgive what is past, Murdoch. We shall understand each other better in the future." They passed out together with their arms linked in friendly fashion. The inspector remained, staring at me in silence with his ox-like eyes.

"Well, you've done it!" he cried at last. "I had read of you, but I never believed it. It's wonderful!"

I was forced to shake my head. To accept such praise was to lower one's own standards.

"I was slow at the outset – culpably slow. Had the body been found in the water I could hardly have missed it. It was the towel which misled me. The poor fellow had never thought to dry himself, and so I in turn was led to believe that he had never been in the water. Why, then, should the attack of any water creature suggest itself to me? That was where I went astray. Well, well, Inspector, I often ventured to chaff you gentlemen of the police force, but Cyanea capillata very nearly avenged Scotland Yard."

When one considers that Mr. Sherlock Holmes was in active practice for twenty-three years, and that during seventeen of these I was allowed to cooperate with him and to keep notes of his doings, it will be clear that I have a mass of material at my command. The problem has always been not to find but to choose. There is the long row of yearbooks which fill a shelf and there are the dispatch-cases filled with documents, a perfect quarry for the student not only of crime but of the social and official scandals of the late Victorian era. Concerning these latter, I may say that the writers of agonized letters, who beg that the honor of their families or the reputation of famous forebears may not be touched, have nothing to fear. The discretion and high sense of professional honor which have always distinguished my friend are still at work in the choice of these memoirs, and no confidence will be abused. I deprecate, however, in the strongest way the attempts which have been made lately to get at and to destroy these papers. The source of these outrages is known, and if they are repeated I have Mr. Holmes's authority for saying that the whole story concerning the politician, the lighthouse, and the trained cormorant will be given to the public. There is at least one reader who will understand.