The article improperly called pumice, which floats down the Missouri during its floods, from the burning coal banks in the Black Hills, I first picked up on the shore in the ascent above Cape Girardeau, and it gave me an intimation that the waters had commenced falling. We came to, the same night, at a well known fountain, called the Moccasin Spring, a copious and fine spring of crystal water, which issues from an elongated orifice in the limestone rock. While lying at the mouth of the river Obrazo, where we were detained on account of hands, several boats touched at the place, carrying emigrants from Vermont and New York, whose destination was the most westerly settlements on the Missouri. At higher points in the ascent we encountered emigrants from Maine, Connecticut, Pennsylvania, North Carolina, and Kentucky, which denotes the wide range of the spirit of migration at the era. The ends of the Union seemed to be brought together by this general movement towards the west. It was not uncommon to find representatives from a great number of the states in these accidental meetings; they were always of a social and highly friendly character, and the effect of such a system of intercommunication and residence, from districts widely separated, could not but be highly auspicious in promoting uniformity of manners and opinions, and assimilating customs, dress, and language. If long continued it must destroy provincialisms, and do much to annihilate local prejudices. Every one who has ascended this stream will recollect the isolated cliff, standing in its waters, called Grand Tower, with the corresponding developments of the coast on the contiguous shores, which tell the traveller plainly enough that here is the site of some ancient disruptive process in the physical history of the valley. The current has an increased velocity in sweeping around this obstacle; and we found, as the waters fell, that there were numerous eddies and strong jets or currents along this precipitous coast, which it required extra force to surmount. We saw one day a number of pelicans standing on a sand bar. The wild turkey and quail were daily encountered on shore.