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smooth and unruffled surface is studded with little islands, where the mountain sheep roam in considerable numbers. What extent of lowland may be encompassed by the high peaks beyond, must remain for the present matter of mere conjecture; though from the form of the summits, and the breaks which may be discovered among them, there can be little doubt that they are the sources of streams calculated to water large tracts, which are probably concealed from view by the rotundity of the lake's surface. At some future day, in all probability, the rich harvest of beaver fur, which may be reasonably anticipated in such a spot, will tempt adventurers to reduce all this doubtful region to the palpable certainty of a beaten track. At present, however, destitute of the means of making boats, the trapper stands upon the shore, and gazes upon a promised land which his feet are never to tread.

Such is the somewhat fanciful view which Captain Bonneville gives of this great body of water. He has evidently taken part of his ideas concerning it from the representations of others, who have somewhat exaggerated its features. It is reported to be about one hundred and fifty miles long, and fifty miles broad. The ranges of mountain peaks which Captain Bonneville speaks of, as rising from its bosom, are probably the summits of mountains beyond it, which may be visible at a vast distance, when viewed from an eminence, in the transparent atmosphere of these lofty regions. Several large islands certainly exist in the lake; one of which is said to be mountainous, but not by any means to the extent required to furnish the series of peaks above mentioned.

Captain Sublette, in one of his early expeditions across the mountains, is said to have sent four men in a skin canoe, to explore the lake, who professed to have navigated all round it; but to have suffered excessively from thirst, the water of the lake being extremely salt, and there being no fresh streams running into it.

Captain Bonneville doubts this report, or that the men accomplished the circumnavigation, because, he says, the lake receives several large streams from the mountains which bound it to the east. In the spring, when the streams are swollen by rain and by the melting of the snows, the lake rises several feet above its ordinary level; during the summer, it gradually subsides again, leaving a sparkling zone of the finest salt upon its shores.

The elevation of the vast plateau on which this lake is situ-