"Jest watch it," he invited Jim. "It's a treat to see it handle rails. You see, our rails wants shifting constantly; for as the diggers clear the dirt they naturally want to get forward or outward, as the case may be, seeing that we cut our steps away to the side. Anyhow, there's need to swap the rails from place to place and lay new tracks, and that 'ere machine is a track layer, which handles the double lengths of bolted rails as if they was sticks."

Jim was fascinated, indeed, as he watched this new wonder; for wonder the machine undoubtedly was. As he looked he could realize that gangs of men and much time might be needed to shift the lines of rails, and time, he remembered, was an item of which his comrades were sparing. Bustle was the order of the day, and of every succeeding day, on the isthmus. As to the machine, it swung its arm over a long length of rail, fastened its clutches upon it, and lifted the double track, ready bolted to its sleepers, into the air. Then it trotted along the rails, and presently deposited its burden somewhere else.

"And by the time it's nipped back for another length, and has brought it, the track gang has got the lengths in line, and has bolted the fishplates to it," explained Harry. "But that digger's waiting for us. Git along, Jim."

Breezy was not the word for this young American. He seemed to enjoy every minute of his life, and would have made an admirable companion for one subject to depression. However, Jim was not that; our hero was naturally inclined to jollity, if at times serious, as became his position of responsibility, but with Harry beside him there was no thought of seriousness. They made a laughing, jolly couple on the digger. The hours flew by, so that Jim was astonished when the five-o'clock whistles blew.

"How's he shaping?" he heard a voice ask, and, turning, found it was Phineas Barton, with another white beside him.

"Shaping! Say, ef there's a digger going free he's fit to take it right off, he's that careful," cried Harry. "See him at it, Major."

"You jest go along as you was before," he whispered in Jim's ear, as the latter hopped back into the cab of the digger. "I ain't going to stay up there alongside of you, 'cos there ain't no need; and you ain't got no cause to feel flustered. The Major's one of the works bosses, and reckon employment lays with him. He'll know in a jiffy that you're able to do the work."

To tell the truth our hero felt somewhat scared at the moment, more even than he had that morning when taking his place for the first time on the machine. But he had perfect confidence now in his powers of control, and, with that assurance to help him, struggled against the unusual feeling of nervousness which had so suddenly attacked him, and let the bucket of the digger rattle down to the bottom of the bank. Time after time he dug his way upwards, and delighted Harry by his management.

"Gee! Ef he ain't got some brass!" the latter exclaimed beneath his breath, as the bucket swung out over the spoil train. "He's copying me with a vengeance. I mind the time when I first started in at the business, and it took me a sight longer to fix the emptying of that bucket. But this here Jim has kind of tumbled to the knack. He swings her out, and ain't stopped swinging afore he opens up and lets his dirt drop. Ef that don't fix the Major, wall he don't deserve to have good men."

As a matter of fact the official was a good deal impressed; but he was a cautious man, and was not inclined to be taken in by a demonstration which might prove to be somewhat freakish. He told himself that under observation there are some men who do better than others, only to break down on ordinary occasions, lacking the stimulus of a gallery to applaud. He yet wanted to prove that this would-be employee had a head on his shoulders, and though he had heard the tale of the rescue, he determined to see if Jim could show coolness on dry land as well as in the water. Therefore he strolled across to the head of the spoil train, to find the driver had not yet quitted his post, in fact he was just in the act of uncoupling from the train, but willingly obeyed an order. Then the official strolled back, to find Jim still busy with the digger, and, waiting a favourable opportunity, waved his arm. What followed made Harry stand up on his toes with anxiety.