"I'm afraid the doctor'll think I took it," he said.

"No matter! He can't prove nothin'."

"We'll find it hard to change the bills."

"No we won't. I'll tell you where to go. Can you play billiards?"

"No; but I'd like to learn."

"I know, and I'll learn you. There's a saloon over in Brooklyn where we can go and have a game. We'll pay out of one of the bills."

Now Sam had long wanted to learn the game of billiards, and this seemed a good opportunity. Perhaps this consideration as much as any determined him to close with his friend's proposal. When, therefore, they had reached the Brooklyn side, instead of taking the horse-cars to Dr. Graham's house, Sam followed his companion to a low billiard saloon not far away.

There were four tables, one of which only was occupied, for it was too early. On one side of the room was a bar, behind which stood a man in his shirt-sleeves.

"Well, boys, what do you want?" he asked.

"We want a table," said Jim. "We're goin to play a game."