“Finding the revolver was a master-stroke of yours, Mansus,” he said, and he was in earnest as he spoke.

The man coloured with pleasure for the subordinates of T. X. loved him, and a word of praise was almost equal to promotion. It was on the advice of Mansus that the road from London to Lewes had been carefully covered and such streams as passed beneath that road had been searched.

The revolver had been found after the third attempt between Gatwick and Horsley. Its identification was made easier by the fact that Vassalaro's name was engraved on the butt. It was rather an ornate affair and in its earlier days had been silver plated; the handle was of mother-o'-pearl.

“Obviously the gift of one brigand to another,” was T. X.'s comment.

Armed with this, his task would have been fairly easy, but when to this evidence he added a rough draft of the threatening letter which he had found amongst Vassalaro's belongings, and which had evidently been taken down at dictation, since some of the words were misspelt and had been corrected by another hand, the case was complete.

But what clinched the matter was the finding of a wad of that peculiar chemical paper, a number of sheets of which T. X. had ignited for the information of the Chief Commissioner and the Home Secretary by simply exposing them for a few seconds to the light of an electric lamp.

Instantly it had filled the Home Secretary's office with a pungent and most disagreeable smoke, for which he was heartily cursed by his superiors. But it had rounded off the argument.

He looked at his watch.

“I wonder if it is too late to see Mrs. Lexman,” he said.

“I don't think any hour would be too late,” suggested Mansus.