The critical moment came sooner than he had anticipated.

A Mr. Gay, one of the regular customers of the bookstore, entered a few minutes later.

"Good-morning, Mr. Baker," he said. "Have you got a 'Tribune' this morning?"

"Yes, here is one. By the way, you are just the man I wanted to see."

"Indeed, I feel complimented."

"Wait till you hear what I am going to say. You bought a copy of 'Corinne' here on Monday?"

"Yes."

"And handed me a five-dollar bill on the Park Bank?"

"Yes."

"Well, I find the bill was a skilfully executed counterfeit."