“Mild,” said the Assistant Commissioner without passion. He remained silent for a little while. “We’ve got hold of a man called Verloc,” he announced casually.

Mr Vladimir did not stumble, did not stagger back, did not change his stride. But he could not prevent himself from exclaiming: “What?” The Assistant Commissioner did not repeat his statement. “You know him,” he went on in the same tone.

Mr Vladimir stopped, and became guttural. “What makes you say that?”

“I don’t. It’s Verloc who says that.”

“A lying dog of some sort,” said Mr Vladimir in somewhat Oriental phraseology. But in his heart he was almost awed by the miraculous cleverness of the English police. The change of his opinion on the subject was so violent that it made him for a moment feel slightly sick. He threw away his cigar, and moved on.

“What pleased me most in this affair,” the Assistant went on, talking slowly, “is that it makes such an excellent starting-point for a piece of work which I’ve felt must be taken in hand—that is, the clearing out of this country of all the foreign political spies, police, and that sort of—of—dogs. In my opinion they are a ghastly nuisance; also an element of danger. But we can’t very well seek them out individually. The only way is to make their employment unpleasant to their employers. The thing’s becoming indecent. And dangerous too, for us, here.”

Mr Vladimir stopped again for a moment.

“What do you mean?”

“The prosecution of this Verloc will demonstrate to the public both the danger and the indecency.”

“Nobody will believe what a man of that sort says,” said Mr Vladimir contemptuously.