“Well, yes, it’s rather late. Still, I have no doubt it would be pleasant enough even then.”

Next day French travelled back to Thirsby. He was in a very despondent frame of mind, for he did not see a single clue or line of inquiry which might lead to the solution of his case. He would, of course, interview Whymper and follow up the affair of the bank note, but he felt certain that the young man had obtained it in a legitimate way, and that his inquiries would lead nowhere.

From the talkative Miss Judith Carr, the barmaid at the Thirsby Arms, French learned that Whymper had lodgings on the outskirts of the town, at 12 Stanhope Terrace, and when dusk had fallen he went out to make the young man’s acquaintance.

Whymper was at work on some plans when French was shown into his sitting-room. He was a typical, healthy-looking Englishman of the upper middle class. French observed him with some favour, as not at all the type to be mixed up in criminal enterprises. He rose on French’s entry, and with a slight look of surprise, indicated an arm-chair at the fire.

“Mr. Pierce Whymper?” French began with his pleasant smile. “My name is French, and I called to see you on a small matter in which I am going to ask your kind help.”

Whymper murmured encouragingly.

“I must explain in the very strictest confidence,” French went on, glancing searchingly at the other, “that I am an inspector in the Criminal Investigation Department of New Scotland Yard, and it is in connection with an investigation I am making that I want your assistance.”

As he spoke French had been watching his companion, not with inimical intent, but as a matter of mere habit. He was surprised and interested to notice a look of apprehension amounting almost to fear in the young man’s eyes, while his face paled perceptibly, and he moved uneasily in his seat. French decided at once to be more careful in his examination than he had intended.

“I have been,” he resumed, “working at Messrs. Cook’s office in Regent Street. I need not go into details, but there has been a robbery, and they have been handling some of the stolen money. Your name appeared among others who had been dealing with them during the period in question, and I am trying to find out if you or these others could unwittingly have passed in the money.”

That Whymper was experiencing considerable relief French was sure. He did not reply, but nodded expectantly.