Inspector Rees submitted Thomasson to a very searching cross-examination, but it was quite evident to all in the room that he knew nothing more than what he had already told. He and his wife had been in Dr Jerrold’s service for eight years. His wife, until her death, a year ago, had acted as cook-housekeeper.

“Did you ever know of Mr Lewin Rodwell visiting the doctor?” asked Sir Houston.

“Never, as far as I know, sir. He, of course, might have come to consult him professionally when I’ve been out, and the maid has sometimes opened the door and admitted patients.”

“Have you ever heard Mr Rodwell’s name?”

“Only on the telephone to-night—and of course very often in the papers,” replied the man.

“Your master was very intimate with Mr Trustram?” inquired the detective.

“Oh yes. They first met about three months ago, and after that Mr Trustram came here several times weekly. The doctor went to stay at his country cottage near Dorking for the week-end, about a fortnight ago.”

“Did you ever discover the reason of those conferences?” Jack Sainsbury asked. “I mean, did you ever overhear any of their conversations?”

“Sometimes, sir. But not very often,” was Thomasson’s discreet reply. “They frequently discussed the war, and the spy-peril, in which—as you know—the doctor was actively interesting himself.”

Upon Jack Sainsbury’s countenance a faint smile appeared. He now discerned the reason of the visits of that Admiralty official to the man who had been so suddenly and mysteriously stricken down.