spray of dust, very slight at first, and hardly to be
distinguished from the mists of the distance, but gradually
growing higher and broader until it formed a solid,
well-defined cloud. This cloud continued to increase in size
until it became evident that it could only be raised by a
great multitude of moving creatures. In more fertile spots
the observer would have come to the conclusion that one of
those great herds of bisons which graze upon the prairie land
was approaching him. This was obviously impossible in these
arid wilds. As the whirl of dust drew nearer to the solitary
bluff upon which the two castaways were reposing, the
canvas-covered tilts of waggons and the figures of armed
horsemen began to show up through the haze, and the apparition
revealed itself as being a great caravan upon its journey for
the West. But what a caravan! When the head of it had
reached the base of the mountains, the rear was not yet
visible on the horizon. Right across the enormous plain
stretched the straggling array, waggons and carts, men on
horseback, and men on foot. Innumerable women who staggered
along under burdens, and children who toddled beside the
waggons or peeped out from under the white coverings.
This was evidently no ordinary party of immigrants, but rather
some nomad people who had been compelled from stress of
circumstances to seek themselves a new country. There rose
through the clear air a confused clattering and rumbling from
this great mass of humanity, with the creaking of wheels and
the neighing of horses. Loud as it was, it was not
sufficient to rouse the two tired wayfarers above them.

At the head of the column there rode a score or more of grave