The way Beezer negotiated his mileage was simple. He'd swing the cab or pilot of the first train along in the direction, up or down, that he wanted to go--and that's how he happened to be standing that afternoon on the track opposite the upper construction camp about a hundred yards below the summit, when Number One climbed up the approach, poked her nose over the top of the grade, crawling like a snail that's worn out with exertion, and then began to gather speed a little, toboggan-like, as she started down the Devil's Slide toward him. Beezer gave a look at her and rubbed his eyes. There wasn't anything to be seen back of the oncoming big mountain racer's cab but a swirling, white, vapory cloud. It was breezing pretty stiff through the hills that day, and his first thought was that she was blowing from a full head, and the wind was playing tricks with the escaping steam. With the next look he gulped hard--the steam was coming from the cab--not the dome. It was the 1016, MacAllister's engine, and when he happened to go up or down on her he always chose the pilot instead of the cab--Beezer never forced his society on any man. But this time he let the pilot go by him--there was something wrong, and badly wrong at that. The cab glass showed all misty white inside, and there was no sign of MacAllister. The drivers were spinning, and the exhaust, indicating a wide-flung throttle, was quickening into a rattle of sharp, resonant barks as the cab came abreast of him. Beezer jumped for the gangway, caught the rail with one hand, clung there an instant, and then the tools in his other hand dropped to the ground, as, with a choking gasp, he covered his face, and fell back to the ground himself. By the time he got his wits about him again the tender had gone by. Then Beezer started to run, and his face was as white as the steam he had stuck his head into in the empty cab. He dashed along beside the track, along past the tender, past the gangway, past the thundering drivers, and with every foot the 1016 and the Imperial Limited, Number One, westbound, was hitting up the pace. When he got level with the cylinder, it was as if he had come to a halt, though his lungs were bursting, and he was straining with every pound that was in him. He was barely gaining by the matter of inches, and in about another minute he was due to lose by feet. But he nosed in over the tape in a dead heat, flung himself sideways, and, with his fingers clutching at the drawbar, landed, panting and pretty well all in, on the pilot. A minute it took him to get his breath and balance, then he crawled to the footplate, swung to the steam chest and from there to the running board.