Jack almost spluttered as he related how the fellow had collected the fine; but the man in gray only shook his head.

"I thought I saw him putting up something," he said. "It's well he didn't get your pocket-book, too! He won't show himself here again to-night. He's safe by this time."

"Do you know him?" asked Jack, greatly excited; but more than a little in dread of the helmet-hat, buttons, and club.

"Know him? 'Jimmy the Sneak?' Of course I do. He's only about two weeks out of Sing Sing. It won't be long before he's back there again. When did you come to town? What's your name? Where'd you come from? Where are you staying? Do you know anybody in town?"

He had a pencil and a little blank-book, and he rapidly wrote out Jack's answers.

"You'll get your eyes open pretty fast, at this rate," he said. "That's all I want of you, now. If I lay a hand on Jimmy, I'll know where to find you. You'd better go home. If any other thief asks you for fifty cents, you call for the nearest policeman. That's what we're here for."

"A whole dollar gone, and nothing to show for it!" groaned Jack, as he walked away. "Only three dollars and a few cents left! I'll walk all the way up to the Hotel Dantzic, instead of paying five cents for a car ride. I'll have to save money now."

He felt more kindly toward all the policemen he met, and he was glad there were so many of them.

"The police at Central Park," he remarked to himself, "and that fellow at the Battery, were all in gray, and the street police wear blue; but they're a good-looking set of men. I hope they will nab Jimmy the Sneak and get back my dollar for me."

The farther he went, however, the clearer became his conviction that dollars paid to thieves seldom come back; and that an evening walk of more than three miles over the stone sidewalks of New York is a long stroll for a very tired and somewhat homesick country boy. He cared less and less, all the way, how strangely and how splendidly the gas-lights and the electric lights lit up the tall buildings.