Here, as we were sitting at our dinner, we observed several small animals, nearly of the size of the common gray squirrel; but shorter, and more clumsily built. They were of a dark gray colour, inclining to brown, with a short thick head, and erect rounded ears. In habits and appearance, they resemble the prairie dog, and are believed to be a species of the same genus. The mouth of their burrow is usually placed under the projection of a rock; and near these the party afterwards saw several of the little animals watching their approach, and uttering all the time a shrill note, somewhat like that of the ground squirrel. Several attempts were made to procure a specimen of this animal, but always without success, as we had no guns but such as carried a heavy ball. After sitting about half an hour, we found ourselves somewhat refreshed, but much benumbed with cold. We now found it would be impossible to reach the summit of the mountain, and return to our camp of the preceding night, during that part of the day which remained; but as we could not persuade ourselves to turn back, after having so nearly accomplished the ascent, we resolved to take our chance of spending the night on whatever part of the mountain it might overtake us. Wilson had not yet been seen; but as no time could be lost, we resolved to go as soon as possible to the top of the peak, and look for him on our return. We met, as we proceeded, such numbers of unknown and interesting plants, as to occasion much delay in collecting; {219} and were under the mortifying necessity of passing by numbers we saw in situations difficult of access. As we approached the summit, these became less frequent, and at length ceased entirely. Few cryptogamous plants are seen about any part of the mountain; and neither these nor any others occur frequently on the top of the peak. There is an area of ten or fifteen acres forming the summit, which is nearly level; and on this part scarce a lichen was to be seen. It is covered to a great depth with large splintery fragments of a rock entirely similar to that found at the base of the peak, except perhaps a little more compact in its structure. By removing a few of these fragments, they were found to rest upon a bed of ice, which is of great thickness, and may, perhaps, be as permanent as the rocks with which it occurs. It was about 4 o'clock P. M. when the party arrived on the summit. In our way we had attempted to cross a large field of snow, which occupied a deep ravine, extending down about half a mile from the top, on the south-eastern side of the peak. This was, however, found impassable, being covered with a thin ice, not sufficiently strong to bear the weight of a man. We had not been long on the summit when we were rejoined by the man who had separated from us, near the outskirts of the timber. He had turned aside and lain down to rest, and afterwards pursued his journey by a different route.