ON the 12th, Lieutenant Graham, Lieutenant Talcott of Camp Missouri, Mr. Seymour, and I, accompanied by a soldier, departed in our small row-boat, for the purpose of ascending Boyer creek,[36] and ascertaining the point at which that stream discharges from the bluffs. The rapidity of the Missouri current soon transported us to the mouth of the creek, and we encamped, after ascending it the distance of a few miles. From this point Messrs. Graham and Talcott crossed the bottom lands, to the base of the bluffs, and by trigonometrical observation, ascertained the altitude of the highest point to be three hundred and fifty feet above low water mark of the Missouri. The next day we continued our voyage, but about noon, perceiving that some necessaries had inadvertently been omitted in our loading, we despatched the soldier to the cantonment to procure them. [36] For Boyer Creek, see preceding volume, note 174.—ED. The following morning we were awakened by the loud cries of the sandhill crane, performing evolutions in the air, high over their feeding grounds. This stately bird is known to authors by the name of grus canadensis. It is mentioned by the enterprizing and excellent traveller, Bartram,[37] in his work, and is very distinct from the grus Americanus of authors, or hooping crane, although many persons have supposed it to be no other than the young of that gigantic species. The sandhill crane, in the spring of the year, removes the surface of the soil by {68} scratching with its feet, in search of the radical tubers of the pea vine, which seem to afford them a very palatable food. Near our present encampment, and in many other situations bordering on streams of water, where this plant vegetates in the greatest profusion, we have frequently had occasion to observe that the surface of the soil was removed in small and irregular patches, by the industry of this bird in seeking for its favourite food. [37] For sketch of Bartram, see André Michaux's _Travels_, in our volume iii, note 177.—ED. This crane is a social bird, sometimes assembling together in considerable flocks. They were now in great numbers, soaring aloft in the air, flying with an irregular kind of gyratory motion, each individual describing a large circle in the air independently of his associates, and uttering loud, dissonant, and repeated cries. They sometimes continue thus to wing their flight upwards, gradually receding from the earth, until they become mere specks upon the sight, and finally altogether disappear, leaving only the discordant music of their concert to fall faintly upon the ear. Mosquitoes have already made their appearance in small numbers.