“I don’t exactly know. The negro must have crept up along the wall. The first thing I knew he was on top of me, and he got in a chance blow with a sandbag.

“Why it didn’t kill me I can’t understand. It lit fair enough. Is the game up, Nick?”

“I don’t think so. How do you feel?”

“Dizzy; but it will pass away.”

Nick examined Patsy carefully.

“You’ve had a narrow escape, my boy,” he said, “but you don’t seem to be much hurt. Do you feel well enough to go on guard again?”

“Sure.”

“Well, I’ll let you do it, since the case is so desperate, but if your head troubles you too much, just push the bell six times as a signal to me and then drop into a carriage on the avenue and go to see Dr. Allen.”

“Don’t you worry about me, Nick,” replied the boy. “I’m only ashamed to have him get the best of me.”

“That’s all right. I’ve got him safe.”