Part 71 (2/2)

In the meantime they were steadily descending. The trees hemmed them closer. Thickets of willows and alders had to be crossed. Dimly through the tree-tops they seemed to see the sky darkening by degrees as they worked their way down. At first Bob thought it the lateness of the afternoon; then he concluded it must be the smoke of the fire; finally, through a clear opening, he saw this apparent darkening of the horizon was in reality the blue of the canon wall opposite, rising as they descended. But, too, as they drew nearer, the heavy smoke of the conflagration began to spread over them. In time it usurped the heavens, and Bob had difficulty in believing that it could appear to any one anywhere as so simple a mushroom-head over a slender smoke column.

By the time the horses stepped from the slope to the bed of the canon, it was quite dark. Jack turned down stream.

”We'll cut the trail to Burro Rock pretty quick,” said he.

Within five minutes of travel they did cut it; a narrow brown trough, trodden by the hoofs of many generations of cattlemen bound for the back country. Almost immediately it began to mount the slope.

Now ahead, through the gathering twilight, lights began to show, sometimes scattered, sometimes grouped, like the camp-fires of an immense army. These were the stubs, stumps, down logs and the like left still blazing after all the more readily inflammable material had been burned away. As the little cavalcade laboured upward, stopping every few minutes to breathe the horses, these flickering lights defined themselves. In particular one tall dead yellow pine standing boldly prominent, afire to the top, alternately glowed and paled as the wind breathed or died. A smell of stale burning drifted down the damp night air. Pretty soon Jack Pollock halted for a moment to call back:

”Here's their fire line!”

Bob spurred forward. Just beyond Jack's horse the country lay blackened.

The pine needles had burned down to the soil; the seedlings and younger trees had been withered away; the larger trees scorched; the fuel with which every forest is littered consumed in the fierceness of the conflagration. Here and there some stub or trunk still blazed and crackled, outposts of the army whose camp-fires seemed to dot the hills.

The line of demarcation between the burned and the unburned areas seemed extraordinarily well defined. Bob looked closer and saw that this definition was due to a peculiar path, perhaps two yards wide. It looked as though some one had gone along there with a huge broom, sweeping as one would sweep a path in deep dust. Only in this case the broom must have been a powerful implement as well as one of wide reach. The brushed marks went not only through the carpet of pine needles, but through the tarweed, the snow brush, the manzanita. This was technically the fire line. At the sight of the positiveness with which it had checked the spread of the flames, Bob's spirits rose.

”They seem to have stopped it here easy enough, already,” he cried.

”Being as how this is the windward side of the fire, and on a down slope, I should think they might,” remarked Jack Pollock drily.

Bob chuckled and glanced at the girl.

”I'm finding out every day how little I know,” said he; ”at my age, too!”

”The hard work is down wind,” said Amy.

”Of course.”

They entered the burned area, and climbed on up the hill. Though evidently here the ferocity of the conflagration had pa.s.sed, it had left its rear guard behind. Fallen trees still blazed; standing trees flamed like torches--but all harmlessly within the magic circle drawn by the desperate quick work of the rangers. They threaded their way cautiously among these isolated fires, watching lest some dead giant should fall across their path. The ground smoked under their feet. Against the background of a faint and distant roaring, which now made itself evident, the immediate surroundings seemed very quiet. The individual cracklings of flames were an undertone. Only once in a while a dull heavy crash smote the air as some great tree gave up the unequal struggle.

They pa.s.sed as rapidly as they could through this stricken field. The night had fallen, but the forest was still bright, the trail still plain. They followed it for an hour until it had topped the lower ridge.

Then far ahead, down through the dark trunks of trees, they saw, wavering, flickering, leaping and dying, a line of fire. In some places it was a dozen feet high; in others it sank to within a few inches of the ground--but nowhere could the eye discern an opening through it. A roar and a crackling filled the air. Sparks were shooting upward in the suction. A blast of heat rushed against Bob's cheek. All at once he realized that a forest fire was not a widespread general conflagration, like the burning of a city block. It was a line of battle, a ring of flame advancing steadily. All they had pa.s.sed had been negligible. Here was the true enemy, now charging rapidly through the dry, inflammable low growth, now creeping stealthily in the needles and among the rocks; always making way, always gathering itself for one of its wild leaps which should lay an entire new province under its ravaging. Somewhere on the other side of that ring of fire were four men. They were trying to cut a lane over which the fire could not leap.

Bob gazed at the wall of flame with some dismay.

”How we going to get through?” he asked.

”We got to find a rock outcrop somewheres up the ridge,” explained Jack, ”where there'll be a break in the fire.”

He turned up the side of the mountain again, leading the way. After a time they came to an outcrop of the sort described, which, with some difficulty and stumbling, they succeeded in crossing.

Ahead, in the darkness, showed a tiny licking little fire, only a few inches high.

”The fire has jumped!” cried Bob.

”No, that's their backfire,” Pollock corrected him.

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