But he was counting his chickens before they were hatched. The cloud of dust blew aside swiftly, and, when he was able to see again, there was the line of cars, nearer by now, leaping madly along, trailing behind them the broken end of the one which had overturned. Right behind, the other portion, together with the greater portion of the last truck of all, was heaped in a confused mass on the second track of rails, disclosing its underframe and its two sets of bogie wheels to the sky. "That passenger train must be only a couple of miles from us now," said Jim, as he desperately jerked at his levers, in the endeavour to force his car more swiftly along the track. "If I can keep ahead for half that distance I shall manage something, for then the incline lessens. Just here she's going faster if anything. If only I could send this car along quicker!" He gazed anxiously over his shoulder, in the direction in which he was flying, and was relieved to discover that the rails were clear. Then he took a careful look at the line of cars bounding after him. There was no doubt that the train was nearer. The leading car was within two hundred yards of him, and a minute's inspection told him clearly that the distance between them was lessening very rapidly; for the runaway now seemed to have taken the bit between her teeth with a vengeance. Despite the weight of earth and rock in the cars they were swaying and leaping horribly, causing their springs to oscillate as they had, perhaps, never done before. The wheels on the leading bogie seemed to be as much off the iron tracks as on them, and at every little curve the expanse of daylight on the inner side beneath the trucks increased in proportions, showing how centrifugal force was pulling the heavy mass and endeavouring to upset it. It was an uncanny sight, but yet, for all that, a fascinating one. Jim watched it helplessly, almost spellbound, conscious that the few moments now before him were critical ones. He unconsciously set to work to calculate how long it would take, at the present rate of comparative progression of his own car and the runaway train, for the inevitable collision to occur. Then, seeing the heaving bogies of the trucks, he leaned over the side of his own car and watched the metal wheels. They clattered and thundered on the rails, the spokes were indistinguishable, having the appearance of disks. But at the bends this was altered. The car tipped bodily, the inner wheels left the tracks, and at once their momentum lessened. Then, though he could not see the individual spokes, the disk-like appearance was broken, telling him plainly, even if his eyes had not been sufficiently keen to actually see the fact, that the wheels and the track had parted company.