returned. Finally the yearling trotted off after the rest of the band,
and the eagle returned to the upper air. Later we found the carcass of a
yearling, with two eagles, not to mention ravens and magpies, feeding on
it; but I could not tell whether they had themselves killed the yearling
or not.

Here and there in the region where the elk were abundant we came upon
horses which for some reason had been left out through the winter. They
were much wilder than the elk. Evidently the Yellowstone Park is a
natural nursery and breeding ground of the elk, which here, as said
above, far outnumber all the other game put together. In the winter, if
they cannot get to open water, they eat snow; but in several places
where there had been springs which kept open all winter, we could see by
the tracks they had been regularly used by bands of elk. The men working
at the new road along the face of the cliffs beside the Yellowstone
River near Tower Falls informed me that in October enormous droves of
elk coming from the interior of the Park and traveling northward to the
lower lands had crossed the Yellowstone just above Tower Falls. Judging
by their description the elk had crossed by thousands in an
uninterrupted stream, the passage taking many hours. In fact nowadays
these Yellowstone elk are, with the exception of the Arctic caribou, the
only American game which at times travel in immense droves like the
buffalo of the old days.

A couple of days after leaving Cottonwood Creek--where we had spent
several days--we camped at the Yellowstone Canon below Tower Falls. Here
we saw a second band of mountain sheep, numbering only eight--none of
them old rams. We were camped on the west side of the canon; the sheep
had their abode on the opposite side, where they had spent the
winter. It has recently been customary among some authorities,