The Indians withdrew long before nightfall; but the following day brought others, and for a week or more there was never a day without this harassing attack upon one flank or another of the host, or sometimes upon both flanks at once. Again and again, as the outer ranks dwindled, Brown Bull found himself nearing the danger zone, and discreetly on each occasion he worked his herd in a few hundred yards nearer the center.
Then, for a space of some days, the attacks of the Indians ceased, and the wolves and coyotes came back to dog the trail of the diminished host. But Brown Bull was not unduly elated by this respite. He held his followers to their place near the center of the march, and maintained his firm and apprehensive vigilance untiringly. The days were now hot and cloudless, and so dry that the host seemed literally to drink up every brook or pond it passed, and an irritating dust-cloud overhung the rear of the trampling hoofs.
But these few days of peace were but prelude to harsher trial. From somewhere far to the left came now a band of white hunters, who rode around the host and attacked it on both flanks at once. They killed more heedlessly and brutally than the Indians, for the sake of the hides rather than for meat, each man hurriedly marking his own kill and then dashing on to seek more victims. Each night they camped, and in the cool of the morning overtook the slow-moving host on their tireless mustangs. The trail of stripped red carcasses which they left behind them glutted all the wolves, coyotes, and carrion crows for leagues about, and affronted the wholesome daylight of the plains. This visitation lasted for five or six days, and the terror it created spread inwards to the very heart of the host. Gradually the host quickened its march, leaving itself little time for feeding and only enough rest for the vitally essential process of rumination. At last the white marauders, satiated with slaughter, dropped behind, and immediately the host, now shrunken by nearly a third, slackened its pace and seemed to forget its punishment. Phlegmatic and short of memory, the herds were restored to content by a day of heavy rain, which laid the dust, and freshened their hides, and instilled new sweetness into the coarse plains grasses. But Brown Bull's apprehensions redoubled, and he grew lean with watching.