The source of the Missouri and that of the Columbia, we are told, are in such immediate proximity, that a walk of but a few miles will enable the traveller to drink from the fountains of each. Yet how unlike their destiny! One passes off through a region of boundless prairie equal in extent to a {253} sixth of our globe; and, after a thousand wanderings, disembogues its troubled waters into the Mexican Gulf; the other, winding away towards the setting sun, rolls on through forests untrodden by human footstep till it sleeps in the Pacific Seas. Their destinies reach their fulfilment at opposite extremes of a continent! How like, how very like are the destinies of these far, lonely rivers to the destinies of human life! Those who, in the beautiful starlight of our boyhood, were our schoolmates and play-fellows, where are they when our sun of ripened maturity has reached its meridian? and what, and where are they and we, when evening's lengthening shadows are gathering over the landscape of life? Our paths diverged but little at first, but mountains, continents, half a world of waters may divide our destinies, and opposite extremes of "the great globe itself" witness their consummation. Yet, like the floods of the far-winding rivers, the streams of our existences will meet again, and mingle in the ocean--that ocean without a shore--_ETERNITY_! The gates of the Rocky Mountains, through which the waters of the Missouri rush forth into the prairies of the great Valley, are described as one of the sublimest spectacles in nature. Conceive the floods of a powerful mountain-torrent compressed in mid career into a width of less than one hundred and fifty yards, rushing with the speed of "the wild horse's wilder sire" through a chasm whose vast walls of Nature's own masonry rear themselves on either side from the raging waters to the precipitous {254} height of twelve hundred perpendicular feet; and then consider if imagination can compass a scene of darker, more terrible sublimity! And then sweep onward with the current, and within one hundred miles you behold a cataract, next to Niagara, from all description grandest in the world. Such are some of the mighty features of the stream upon which I was now standing.