Two violent gusts drove me to shelter beneath a shelving rock. After half a minute a long lull came and the air cleared of snow dust. There within thirty feet of me were a number of mountain sheep. Two were grazing in a space swept bare by the wind. Another was lying down, not in shelter, but out in an exposed place. Then I caught sight of two lambs and I failed to see what the other sheep were doing. Those lambs! They were in a place where the wind hit violently, as the bare space around them showed. They were pushing each other, butting their heads together, rearing up on their hind legs. As I watched them another gust came roaring forward; they stopped for a second and then rushed toward it. I caught my last glimpse just as it struck them and they both leaped high to meet it. I was in the heights when a heavy snow came down and did not drift. It lay deeply over everything except pinnacles and sharp ridges. I made a number of snowshoe trips to see how sheep met this condition. During the storm one flock had stood beneath an overhanging cliff. When the snowfall ceased the sheep wallowed to the precipitous edge of the plateau and at the risk of slipping overboard had travelled along an inch or less wide footing for more than a mile. Where the summit descended by steep slope they ventured out. Steepness and snow weight before their arrival, perhaps with the assistance of their tramplings, had caused the snow at the top to slip. As the slide thus started tore to the bottom it scraped a wide swath free of snow. In this cleared strip the sheep were feeding contentedly. Snowslides, large and small, often open emergency feeding spaces for sheep. Long snowshoe excursions on the Continental Divide have often brought me into the presence of mountain sheep in the snow. They are brave, self-reliant, capable, and ever alert for every advantageous opportunity or opening. One snowy time I searched the heights for hours without finding any sheep. But in descending I found a number upon a narrow sunny ledge that was free from snow; the trampling and the warmth of the sheep probably had helped clear this ledge. Here they could find scanty rations for a week or longer. I could not make out whether they had spent the storm time here or had come to it afterward. In the heights are numerous ledges and knife-edge ridges on which but little snow can lodge. The cracks and niches of these hold withered grass, alpine plants, and moss, which afford an emergency food supply that often has saved snow-bound sheep.