A hardware clerk testified to selling Burton a revolver on the morning the theft was discovered.

Polly Lester was next called. She took the usual oath, and Lawyer Perkins rose to question her.

“What is your name?”

“Doris Landin.”

“Your profession?”

“I am a private detective.”

At these words a buzz of astonishment ran about the crowded room. To many present the girl was a stranger, but others knew her as a domestic at Mrs. Goode’s boarding-house.

“And you, too, were watching Burton?”

“Yes, sir.”

“What did you learn of him.”