He shook the bridle, laughed softly as the frame houses flitted by, and then grew intent when the darkness of the prairie once more closed down. It was, he knew, probable that some of Stimson's men would be looking out for him, and he had not sufficient faith in Courthorne's assurances to court an encounter with them.

The lights had faded, and the harsh grass was crackling under the drumming hoofs when the blurred outline of a mounted man showed up on the crest of a rise, and a shout came down.

"Hello! Pull up there a moment, stranger."

There was nothing alarming in the greeting, but Winston recognized the ring of command, as well as the faint jingle of steel which had preceded it, and pressed his heels home. The black swung forward faster, and Winston glancing over his shoulder saw the dusky shape was now moving down the incline. Then the voice rose again more commandingly.

"Pull up, I want a talk with you."

Winston turned his head a moment, and remembering Courthorne's English flung back the answer, "Sorry I haven't time."

The faint musical jingle grew plainer, there was a thud of hoofs behind, and the curious exhilaration returned to Winston as the big black horse stretched out at a gallop. The soil was hard as granite, but the matted grasses formed a covering that rendered fast riding possible to a man who took the risks, and Winston knew there were few horses in the Government service to match the one he rode. Still, it was evident that the trooper meant to overtake him, and recollecting his compact he tightened his grip on the bridle. It was a long way to the ranch where he was to spend the night, and he knew that the further he drew the trooper on, the better it would suit Courthorne.

So they swept on through the darkness over the empty waste, the trooper who was riding hard slowly creeping up behind. Still, Winston held the horse in until a glance over his shoulder showed him that there was less than a hundred yards between them, and he fancied he heard a portentous rattle as well as the thud of hoofs. It was not unlike that made by a carbine flung across the saddle. This suggested unpleasant possibilities, and he slackened his grip on the bridle. Then a breathless shout rang out, "Pull up or I'll fire."

Winston wondered if the threat was genuine or what is termed "bluff" in that country, but, as he had decided objections to being shot in the back to please Courthorne, sent his heels home. The horse shot forward beneath him, and, though no carbine flashed, the next backward glance showed him that the distance between him and the pursuer was drawing out, while when he stared ahead again the dark shape of willows or birches cut the sky-line. As they came back to him the drumming of hoofs swelled into a staccato roar, while presently the trail grew steep, and dark boughs swayed above him. In another few minutes something smooth and level flung back a blink of light, and the timbers of a wooden bridge rattled under his passage. Then he was racing upwards through the gloom of wind-dwarfed birches on the opposite side listening for the rattle behind him on the bridge, and after a struggle with the horse pulled him up smoking when he did not hear it.

There was a beat of hoofs across the river, but it was slower than when he had last heard it and grew momentarily less audible, and Winston laughed as he watched the steam of the horse and his own breath rise in a thin white cloud.