An ejaculation of annoyance escaped his lips, and he turned to the dainty little desk at another portion of the room. It was locked, but that was a matter of little consequence. Like most detectives, Foyle carried a bunch of keys rather larger than are to be found in the possession of the ordinary man, and the fourth that he tried fitted.

The neat interior slab of the desk was clear and tidy. One or two letters of no consequence reposed in

an inside drawer, and these the superintendent replaced. A footstep outside caused him hurriedly but noiselessly to close the desk and resume his seat, sitting idly with crossed legs. But the interrupter passed, and he returned to the desk. From a recess he drew out a cheque-book and examined the counterfoils of the used cheques with interest. The last counterfoil was blank.

"Ah!" he muttered, with a jerky little nod of satisfaction, and turned his attention to the blotting-pad. A few minutes' close inspection and he drew the top sheet away and, rolling it up, placed it in the breast-pocket of his overcoat. Again he closed the desk and glanced at his watch. A touch at the bell summoned the footman.

"I don't think I'll wait, after all," said Foyle. "Time's getting on, and I've several things to attend to."

"Shall I tell Lady Eileen you called, sir?"

"Oh yes, certainly. Tell her I'll call back about six this evening."

In deep thought Heldon Foyle sauntered away from the house, and Maxwell joined him as they turned a corner. The superintendent said nothing till they reached Piccadilly. Then he tore a sheet of note-paper from his pocket-book and handed it to his companion.

"Cut along up to the Metropolitan and Provincial Bank, Maxwell. A cheque, No. A834,076 for £200, signed Burghley, has been presented this morning. Find out who cashed it and how it was paid. If there were any notes, get their numbers and come straight on to me at the Yard."

The superintendent swung himself on to a passing