"Come on, let's get out of here," Mac abruptly proposed. "We'll have to make Pend d' Oreille and send word to Walsh. It'll take the whole force to catch them now."

My gun lay where it had fallen when Hicks whacked me over the head. I picked it up, replaced the empty cartridge, and shoved it back into the scabbard. MacRae hoisted the carbine to his shoulder, and we started.

We poked along slowly at first, for I was still a bit dizzy from that blow. Before long we came to a spring seeping from the hillside, and when I had bathed my head in the cool water I began to feel more like myself. Thereafter, we tramped silently across high, dry benches, slid and scrambled to the bottoms of an endless succession of coulées, and wearily climbed the steep banks that lay beyond. The cool morning wind died away; the sun reeled up on its appointed circle, glaring brazenly into every nook and cranny in the land. Underfoot, the dry sod grew warm, then hot, till the soles of our boots became instruments of torture to feet that were sadly galled by fruitless tramping around the Stone. When a man has grown up in the habit of mounting a horse to travel any distance over three hundred yards, a walk of twenty undulating miles over a network of bald ridges and yawning coulées makes him think that a sulphur-and-brimstone hereafter can't possibly hold much discomfort that he hasn't sampled. A cowpuncher in high-heeled riding-boots is handicapped for pedestrianism by both training and inclination—and that scarred and wrinkled portion of the Northwest is a mighty poor strolling-ground for any man.

But we kept on, for the simple reason that there was nothing else we could do. MacRae wasted no breath in words. If the heat and the ungodly steepness of the hills and the luke-warm water that trickled along the creek channels ruffled his temper, he made no noise about it, only pressed doggedly toward Pend d' Oreille. I daresay he thought I was attending to that part of it, registering a complaint for both of us. And if I didn't rise to the occasion it was the fault of my limited vocabulary. I kept a stiff backbone for a while, but presently a futile rage against circumstances bubbled up and boiled over. I climbed each succeeding canyon wall oozing perspiration and profanity, and when the top was reached took fresh breath and damned the Northwest by sections in a large, fluent manner of speech. In time, however, the foolishness of this came home to me, and I subsided into spasmodic growling, saving my wind for the miles yet to cover.

Well past noon we reached the summit of a hog-backed ridge that overlooked the tortuous windings of Lost River, a waterless channel between banks that were void of vegetation. The crest of the divide was studded with great outcroppings of sand-stone, and in the shadow of one giant rock we laid down to rest before we descended into that barren valley where the heat-waves shimmered like crepon silk. The cool bit of earth was good to stretch upon; for nearly an hour we laid there, beyond reach of the glowing sun; it was worth almost the treasure we had lost to ease our aching feet. Then reluctantly we started again.

As we stepped from behind the rock three riders came into sight on the opposite slope of Lost River. A moment's scrutiny assured us that they were Mounted Policemen. From habit our eyes swept the surrounding country, and in a moment we observed other groups of mounted men, an equal distance apart and traveling in the same general direction—like a round-up sweeping over a cattle-range.

"They're out for somebody. I shouldn't be surprised if they have smelled out our friends," said MacRae. "And seeing this bunch is heading right toward us, we might as well take it easy here till they come up."

Returning to the cool shade, we waited till they crossed that miniature desert. I looked once or twice, and hoped we would not have to walk over it; I'd seen the Mohave and the Staked Plains, and I knew it was sizzling hot in that ancient river-bed—it is hot, and dry, when the heat-waves play tricks with objects seen from afar. Those three riders moved in a transparent haze, distorted, grotesque figures; now giants, broad, uncouth shapes; now pigmies astride of horses that progressed slowly on long, stiltlike legs, again losing form and waving like tall, slender trees swayed by vagrant winds. After a time they ascended above the level where the superheated atmosphere played its pranks, and came riding up the ridge in their true presentment. When they got within shouting distance we stepped into the sunlight and hailed them.

From the moment that they jerked up their horses at MacRae's call, I had an odd sense of impending trouble. For an instant it seemed as if they were about to break for cover; and when they approached us there was a strained, expectant expression on each tanned face, a wariness in their actions that looked unnatural to me. The nearer they came the more did I feel keyed up for some emergency. I can't explain why; that's something that I don't think will bear logical analysis. Who can explain the sixth sense that warns a night-herder of a stampede a moment before the herd jumps off the bed-ground? But that is how I felt—and immediately it transpired that there was good reason.

They stopped their horses within ten feet of us and dismounted, all three of them, a corporal and two privates, in the same breath that we said "hello." The corporal, rather chalky-looking under his tan, stepped forward and laid a hand on MacRae's shoulder.