And then in a flash I realised my folly.

The wretched letter I had written that morning had given the whole show away. Lumley knew that I was a friend of Pitt-Heron, and that I knew that he was a friend of Pitt-Heron. If my guess was right, friendship with Lumley was not a thing Charles was likely to confess to, and he would argue that my knowledge of it meant that I was in Charles's confidence. I would therefore know of his disappearance and its cause, and alone in London would connect it with the decorous bachelor of the Albany. My letter was a warning to him that he could not play the game unobserved, and I, too, would be suspect in his eyes.

It was no good crying over spilt milk, and Lumley's suspicions must be accepted. But I confess that the thought gave me the shivers. The man had a curious terror for me, a terror I cannot hope to analyse and reproduce for you. My bald words can give no idea of the magnetic force of his talk, the sense of brooding and unholy craft. I was proposing to match my wits against a master's, one, too, who must have at his command an organisation far beyond my puny efforts. I have said that my first feeling was that of loneliness and isolation; my second was one of hopeless insignificance. It was a boy's mechanical toy arrayed against a Power-House with its shining wheels and monstrous dynamos.

My first business was to get into touch with Tommy.

At that time I had a friend in one of the Embassies, whose acquaintance I had made on a dry-fly stream in Hampshire. I will not tell you his name, for he has since become a great figure in the world's diplomacy, and I am by no means certain that the part he played in this tale was strictly in accordance with official etiquette. I had assisted him on the legal side in some of the international worries that beset all Embassies, and we had reached the point of intimacy which is marked by the use of Christian names and by dining frequently together. Let us call him Monsieur Felix. He was a grave young man, slightly my senior, learned, discreet, and ambitious, but with an engaging boyishness cropping up now and then under the official gold lace. It occurred to me that in him I might find an ally.

I reached London about eleven in the morning, and went straight to Belgrave Square. Felix I found in the little library off the big secretaries' room, a sunburnt sportsman fresh from a Norwegian salmon river. I asked him if he had half an hour to spare, and was told that the day was at my service.

"You know Tommy Deloraine?" I asked.

He nodded.

"And Charles Pitt-Heron?"

"I have heard of him."