Behind the maddened animals, swaying and now and again skimming sidewise on one runner, and as often lifted clear of the ground, was a sledge of swan-like outline, from which trailed the dragging ends of furry robes.

As in the span of a clock-tick the young aviators had sight of a child clinging to the high back of the sleigh, a little girl, her hood fallen and twisted over shoulder, and her bright crown of curls tangling about her set, white face.

With every nerve tense, and as if strung on one wire, Billy and Henri had a second to think, and in the next time flash to act.

In the passing the sleigh swung dangerously close to the curb, upon which the lads were poised for a spring at the wildly careening conveyance.

With the opportunity, the boys leaped together—Billy went sprawling into the pile of furs in the bowl of the vehicle, while Henri had a close call in getting aboard at all, just managing to grasp the hand-curve of the rear seat, and his knees were sweeping the street surface for twenty or thirty feet before he attained foothold on the runners.

The U. S. A. boy leaned far out of the bed of the sleigh, with lowered hands, striving to reach the trailing reins, whipping about in the wake of the racing steeds.

Two men ahead tried for the curb bits of the high-checked horses, but were hurled aside like featherweights. Billy had a fleeting glance at one of the brave fellows, lying quite still, face down, in the street.

The width of the avenue—about 150 feet—and its straight length—more than five miles—had so far afforded a fighting chance of escaping death-dealing collision.

The action in this saving venture of our boys cannot be followed in its rapidity by the telling of it. When Billy found, with a grab or two, that the reaching of the reins was a long shot, he was up with a jump and at the scroll-turned front of the sleigh.

The crupper of one of the runaways was at his hand—this horse was lagging a little. The next instant, and the boy was clinging to the rein rings of the top harness and digging his heels into the heaving flanks of the laboring animal. Working forward with the same celerity, Billy got a hand-twist on the reins where they doubled to the bit.