“No good. They might stuff your city with plainclothes detectives and double the police and Constantine would still be a doomed man. My friends are not playing this game for candy. They want a big occasion for the taking off, with the eyes of all Europe on it. He’ll be murdered by an Austrian, and there’ll be plenty of evidence to show the connivance of the big folk in Vienna and Berlin. It will all be an infernal lie, of course, but the case will look black enough to the world. I’m not talking hot air, my friend. I happen to know every detail of the hellish contrivance, and I can tell you it will be the most finished piece of blackguardism since the Borgias. But it’s not going to come off if there’s a certain man who knows the wheels of the business alive right here in London on the 15th day of June . And that man is going to be your servant, Franklin P. Scudder.”

I was getting to like the little chap. His jaw had shut like a rattrap, and there was the fire of battle in his gimlety eyes. If he was spinning me a yarn he could act up to it.

“Where did you find out this story?” I asked.

“I got the first hint in an inn on the Achensee in Tyrol. That set me inquiring, and I collected my other clues in a fur-shop in the Galician quarter of Buda, in a Strangers’ Club in Vienna, and in a little bookshop off the Racknitzstrasse in Leipzig. I completed my evidence ten days ago in Paris. I can’t tell you the details now, for it’s something of a history. When I was quite sure in my own mind I judged it my business to disappear, and I reached this city by a mighty queer circuit. I left Paris a dandified young French-American, and I sailed from Hamburg a Jew diamond merchant. In Norway I was an English student of Ibsen collecting materials for lectures, but when I left Bergen I was a cinema-man with special ski films. And I came here from Leith with a lot of pulpwood propositions in my pocket to put before the London newspapers. Till yesterday I thought I had muddied my trail some, and was feeling pretty happy. Then⁠ ⁠…”

The recollection seemed to upset him, and he gulped down some more whisky.