The great American Falls of Snake River were twenty miles or so farther up, and, much to our regret, we failed to reach them. Mr. Halsey intended taking us that way, but he was already overdue in Boisè, and as I myself had lost a fortnight by illness at Salt Lake, and the weather was threatening, we concluded to hasten on. These falls have been described by some travellers, as much superior to Niagara; but the station-keeper at Snake River said he had visited them the previous spring, and they seemed to him to be only about a hundred feet or so in height in all. He described them, as consisting of two Falls--the first about twenty-five feet high, with foaming rapids to the second or main fall, which itself then goes down perhaps seventy-five feet or so more. He said, however, that a party of soldiers, from an adjacent post, had measured them only a few weeks before, and they reported them as one hundred and ninety-four feet high in all, by perhaps two hundred yards wide, and with the black basaltic walls of the cañon rising some six hundred feet above them still, on either side. During seasons of high water, this would make them quite worthy, indeed, of their great reputation. But the volume of water there for many months in the year must be so small, that it is to be doubted whether they ordinarily approach the grandeur and sublimity of majestic old Niagara. However, Idahoans set great store by these Falls, as the chief wonder of all that region; and as the country just there has little else to brag of, perhaps it is well not to gainsay them.