Mr. Briggerland, it seemed, had some other object in life than the regeneration of the criminal classes. He was a sociologist--a loose title which covers a great deal of inquisitive investigation into other people's affairs. Moreover, he had published a book on the subject. His name was on the title page and the book had been reviewed to his credit; though in truth he did no more than suggest the title, the work in question having been carried out by a writer on the subject who, for a consideration, had allowed Mr. Briggerland to adopt the child of his brain.

On a morning when pale yellow sunlight brightened his dining-room, Mr. Briggerland put down his newspaper and looked across the table at his daughter. He had a club in the East End of London and his manager had telephoned that morning sending a somewhat unhappy report.

"Do you remember that man Talmot, my dear?" he asked.

She nodded, and looked up quickly.

"Yes, what about him?"

"He's in hospital," said Mr. Briggerland. "I fear that he and Hoggins were engaged in some nefarious plan and that in making an attempt to enter--as, of course, they had no right to enter--a block of flats in Cavendish Place, poor Talmot slipped and fell from the fourth floor window-sill, breaking his leg. Hoggins had to carry him to hospital."

The girl reached for bacon from the hot plate.

"He should have broken his neck," she said calmly. "I suppose now the police are making tender inquiries?"

"No, no," Mr. Briggerland hastened to assure her. "Nobody knows anything about it, not even the--er--fortunate occupant of the flat they were evidently trying to burgle. I only learnt of it because the manager of the club, who gets information of this character, thought I would be interested."

"Anyway I'm glad they didn't succeed," said Jean after a while. "The possibility of their trying rather worried me. The Hoggins type is such a bungler that it was almost certain they would fail."

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It was a curious fact that whilst her father made the most guarded references to all their exploits and clothed them with garments of euphemism, his daughter never attempted any such disguise. The psychologist would find in Mr. Briggerland's reticence the embryo of a once dominant rectitude, no trace of which remained in his daughter's moral equipment.

"I have been trying to place this man Jaggs," she went on with a little puzzled frown, "and he completely baffles me. He arrives every night in a taxicab, sometimes from St. Pancras, sometimes from Euston, sometimes from London Bridge Station."