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The rugged mountain chain forming the western boundary of the valley, afforded numerous black-tailed deer and sheep. The skills of these animals being much larger than those of the common deer and antelope, I was induced to scour the vicinity, occasionally, in pursuit of them.

One day, having gone to a considerable distance on this errand, I was passing along upon the crest of a sharp peak, of great height and steep sides.

The ridge ranged from northwest to southeast, leaving upon its right side a vast spread of smooth snow, encrusting it from summit to base, and upon its left, a lateral vallon, entirely bare and graced with frequent spots of grass, as yet green and flourishing.

One of these niches was occupied by a band of wild sheep, which were so situated they could not be successfully approached, unless from the opposite side of the peak. Attempting this, I was proceeding slowly along, by means of steps implanted in the thick crust with the breech of my rifle, and had almost attained the point designed, when, losing foot-hold, I fell prostrate, and, after gliding the distance of a full mile, almost with the speed of thought, found myself immersed in a huge bank of loose snow, at the foot of the mountain.

It is all nonsense to talk of steam-boats and rail-road cars, in comparison with the velocity of such a lofty specimen of "gettin down stairs!" Few mortals, I may venture to say, ever got along in the world half so fast as did myself in this grand avalanche from the mountain-top.

The country contiguous to this valley is generally possessed of a very good soil, both in the prairies, table lands, and mountains. Bordering upon the watercourses, the surface discloses a deep mould of sand and gravel, exceedingly fertile, reposed upon a substratum of granite and micaceous sandstone; the prairies presented a mixed superfice of sand, clay, and gravel, rather thin and light, and strongly impregnated with various salts, and the table lands, a compound of stiff clay, stone, and gravel, partially enriched by the fertilizing properties of vegetable and animal matter and the genial auxiliaries of disintegrated rock, with now and then a diminutive spot destitute of grass or herb and whitened by a thin coating of saline efflorescence.

The prevailing rock is sandstone, granite, gneiss, limestone, and large boulders of the primitive formation.

The only indication of minerals, so far as my observation extended, was that of iron, though doubtless due research would bring to light a rich supply of other valuable ores.