“How do yer know it’s a swindle?” asked Carrow, faintly.

“Because he didn’t put the number in the envelope.”

“Are yer sure o’ thet?”

“Yes.”

“Nonsense!” cried the swindler. “This is a perfectly honest game of chance.”

“He had two numbers in his hand. The first time he placed one of them in the envelope, but this time he placed the other, and you can be sure it wasn’t the fifty.”

“See here, you get out of here!” cried the swindler, in a rage. “I have a good mind to have you arrested for interfering with my business.”

“You may have me arrested if you wish,” replied the young photographer, coolly.

The swindler rushed from behind his stand and caught Bob by the arm.

“Let go!”