“Well, that is pretty clear also. There are evidently only two of them in it. The other is impersonating you at the office. This one acted as your engager, and then found that he could not find you an employer without admitting a third person into his plot. That he was most unwilling to do. He changed his appearance as far as he could, and trusted that the likeness, which you could not fail to observe, would be put down to a family resemblance. But for the happy chance of the gold stuffing, your suspicions would probably never have been aroused.”

Hall Pycroft shook his clinched hands in the air. “Good Lord!” he cried, “while I have been fooled in this way, what has this other Hall Pycroft been doing at Mawson’s? What should we do, Mr. Holmes? Tell me what to do.”

“We must wire to Mawson’s.”

“They shut at twelve on Saturdays.”