And yet for all his watchfulness he was never depressed. On the contrary, I can never recollect having seen him in such exuberant spirits. Again and again he recurred to the fact that if he could be assured that society was freed from Professor Moriarty he would cheerfully bring his own career to a conclusion.

“I think that I may go so far as to say, Watson, that I have not lived wholly in vain,” he remarked. “If my record were closed to-night I could still survey it with equanimity. The air of London is the sweeter for my presence. In over a thousand cases I am not aware that I have ever used my powers upon the wrong side. Of late I have been tempted to look into the problems furnished by nature rather than those more superficial ones for which our artificial state of society is responsible. Your memoirs will draw to an end, Watson, upon the day that I crown my career by the capture or extinction of the most dangerous and capable criminal in Europe.”

I shall be brief, and yet exact, in the little which remains for me to tell. It is not a subject on which I would willingly dwell, and yet I am conscious that a duty devolves upon me to omit no detail.

It was on the third of May that we reached the little village of Meiringen, where we put up at the Englischer Hof, then kept by Peter Steiler the elder. Our landlord was an intelligent man and spoke excellent English, having served for three years as waiter at the Grosvenor Hotel in London. At his advice, on the afternoon of the fourth we set off together, with the intention of crossing the hills and spending the night at the hamlet of Rosenlaui. We had strict injunctions, however, on no account to pass the falls of Reichenbach, which are about halfway up the hills, without making a small detour to see them.

It is, indeed, a fearful place. The torrent, swollen by the melting snow, plunges into a tremendous abyss, from which the spray rolls up like the smoke from a burning house. The shaft into which the river hurls itself is an immense chasm, lined by glistening coal-black rock, and narrowing into a creaming, boiling pit of incalculable depth, which brims over and shoots the stream onward over its jagged lip. The long sweep of green water roaring forever down, and the thick flickering curtain of spray hissing forever upward, turn a man giddy with their constant whirl and clamour. We stood near the edge peering down at the gleam of the breaking water far below us against the black rocks, and listening to the half-human shout which came booming up with the spray out of the abyss.

The path has been cut halfway round the fall to afford a complete view, but it ends abruptly, and the traveller has to return as he came. We had turned to do so, when we saw a Swiss lad come running along it with a letter in his hand. It bore the mark of the hotel which we had just left and was addressed to me by the landlord. It appeared that within a very few minutes of our leaving, an English lady had arrived who was in the last stage of consumption. She had wintered at Davos Platz and was journeying now to join her friends at Lucerne, when a sudden hemorrhage had overtaken her. It was thought that she could hardly live a few hours, but it would be a great consolation to her to see an English doctor, and, if I would only return, etc. The good Steiler assured me in a postscript that he would himself look upon my compliance as a very great favour, since the lady absolutely refused to see a Swiss physician, and he could not but feel that he was incurring a great responsibility.