A dog, that is happy and well, settles himself for a prolonged wait, by stretching out on his side;—oftenest the left side; and by dropping off into slumber. Seldom, unless he be cold or ill, does a big dog curl up into a ball, to rest. Nor is he thoroughly comfortable in such a posture.

Lad was not comfortable. He was not resting. He was wretched. Nor did he try to snooze. Curled in a compact heap, his sorrowful eyes abrim with sorrow, he lay scanning the bumpy mountainside and straining his ears, for sign of the car's return. His breathing was not as splendidly easy as usual. For, increasingly, that earlier twinge of acrid smoke-reek was tickling his throat. The haze, that had hovered over the farther hilltops and valleys, was thickening; and it was creeping nearer. The breath of morning breeze was stiffening into a steady wind; a wind that blew strong from the west and carried on it the smell of forest fire.

Lad did not enjoy the ever-stronger smoke scent. But he gave only half-heed to it. His main attention was centered on that winding wagon-track whence the car and the truck had vanished into the lowlands. And, through the solemnly spent hours he lay forlornly watching it.

But, after sunset, the smoke became too pervasive to be ignored longer. It was not only stinging his throat and lungs, but it was making his eyes smart. And it had cut off the view of all save the nearer mountain-peaks.

Lad got to his feet; whining softly, under his breath. Ancestral instinct was fairly shouting to his brain that here was terrible peril. He strained at his thick rope; and looked imploringly down the wagon-road.

The wind had swelled into something like a gale. And, now, to Lad's keen ears came the far-off snap and crack of a million dry twigs as the flame kissed them in its fast-crawling advance. This sharper sound rose and fell, as a theme to the endless and slowly-augmenting roar which had been perceptible for hours.

Again, Laddie strained at his heavy rope. Again, his smoke-stung eyes explored the winding trail down the mountain. No longer was the trail so distinguishable as before. Not only by reason of darkness, but because from that direction came the bulk of the eddying gusts of wind-driven smoke.

The fire's mounting course was paralleling the trail; checked from crossing it only by a streambed and an outcrop of granite which zigzagged upward from the valley. The darkness served also to tinge the lowering sky to south and to westward with a steadily brightening lurid glare. The Master had been right in his glum prophecy that a strong and sudden shift of wind would carry the conflagration through the tinder-dry undergrowth and dead trees of that side of the mountain, far faster than any body of fire-fighters could hope to check it.

The flame-reflection began to light the open spaces below the knoll, with increasing vividness. The chill of early evening was counteracted waves of sullen heat, which the wind sent swirling before it.

Lad panted; from warmth as much as from nervousness. He had gone all day without water. And a collie, more perhaps than any other dog, needs plenty of fresh, cool water to drink; at any and all times. The hot wind and the smoke were parching his throat. His thirst was intolerable.