When Michael Cantwell was charged with poisoning his wife, was it not Roper who discovered that the wife had poisoned herself, and left a letter laying the blame on her husband out of revenge? Why, these stories are the common talk of the detective force, and when Gerald Foster asked Roper to take the "Verschoyle Mystery" in hand, he knew he had got a good man, with the sagacity of a sleuth-hound, and the inflexible determination of a Richelieu.

And, indeed, when the case was explained to Julian by the barrister, that astute gentleman had eagerly agreed to do his best in discovering the culprit, for it was a mystery which delighted his soul. In fact, Roper was in love with these Chinese puzzles of social life, and nothing pleased him so much as spending months in adding, link by link, to a chain of evidence ending, in the complete clearing up of a curious case.

So the three gentlemen sat in Foster's office, and talked the case over. Ronald; eager and attentive to the views of the others; Foster, quiet, cynical, and keen; and Roper, calm and unfathomable, with his sharp, blue eyes bent on both, and his acute hearing taking in every word said.

It is no use sketching Roper's portrait, for like Proteus he had many shapes, and what the real Roper was no one knew. One day he would be a parson, the next, a sporting gentleman, the third day a tramp, and so on, until the noble fraternity of thieves actually began to suspect each other, so ubiquitous and clever was the famous detective.

"It's the strangest case I was ever in," said Mr. Roper, in his soft, low voice; "but one which it will be a pleasure to work at. At present we have the merest clue. Now, the great thing is to follow it up."

"First," said Foster, taking some papers from the drawer of his desk, "let us look at the divorce case, 'Verschoyle v. Verschoyle and Macgregor.'"

"Oh, we know all about that!" said Ronald, impatiently.

"Not all of it," replied Gerald, smoothing the brief. "In the first place what do you think was the name of Mrs. Verschoyle?"

"Her maiden name?"

"Yes."