There was not much business doing on this road as yet, and the two cars of the passenger-trains were often nearly empty, though full freight-trains rolled from the factory to the main road, of which this was only a branch. So things went on in a leisurely manner, which gave Frank many opportunities of pursuing his favorite pastime. He soon knew all about No. 11, his pet engine, and had several rides on it with Bill, the engineer, so that he felt at home there, and privately resolved that when he was a rich man he would have a road of his own, and run trains as often as he liked.

Gus took less interest than his friend in the study of steam, but usually accompanied him when he went over after school to disport himself in the engine-house, interview the stoker, or see if there was anything new in the way of brakes.

One afternoon they found No. 11 on the side-track, puffing away as if enjoying a quiet smoke before starting. No cars were attached, and no driver was to be seen, for Bill was off with the other men behind the station-house, helping the expressman, whose horse had backed down a bank and upset the wagon.

"Good chance for a look at the old lady," said Frank, speaking of the engine as Bill did, and jumping aboard with great satisfaction, followed by Gus.

"I'd give ten dollars if I could run her up to the bend and back," he added, fondly touching the bright brass knobs and glancing at the fire with a critical eye.

"You couldn't do it alone," answered Gus, sitting down on the grimy little perch, willing to indulge his mate's amiable weakness.

"Give me leave to try? Steam is up, and I could do it as easy as not;" and Frank put his hand on the throttle-valve, as if daring Gus to give the word.

"Fire up and make her hum!" laughed Gus, quoting Bill's frequent order to his mate, but with no idea of being obeyed.

"All right; I'll just roll her up to the switch and back again. I've often done it with Bill;" and Frank cautiously opened the throttle-valve, threw back the lever, and the great thing moved with a throb and a puff.

"Steady, old fellow, or you'll come to grief. Here, don't open that!" shouted Gus, for just at that moment Joe appeared at the switch, looking ready for mischief.

"Wish he would; no train for twenty minutes, and we could run up to the bend as well as not," said Frank, getting excited with the sense of power, as the monster obeyed his hand so entirely that it was impossible to resist prolonging the delight.

"By George, he has! Stop her! Back her! Hold on, Frank!" cried Gus, as Joe, only catching the words "Open that!" obeyed, without the least idea that they would dare to leave the siding.

But they did, for Frank rather lost his head for a minute, and out upon the main track rolled No. 11 as quietly as a well-trained horse taking a familiar road.