Hydrographical Basin of the Upper Mississippi River From Astronomical and Barometrical Observations Surveys and Information by J.N. Nicollet, in the Years 1836, 37, 38, 39 & 40, assisted in 1938, 39 & 40 by Lieut. J.C. Frémont,... under the superintendence of the Bureau of the Corps of Topographical Engineer and authorized by the War Department. / Reduced and compiled under the direction of Col.J.J. Abert, ... by Lieut.W.H. Emory from the Map published in 1842 and from other authorities in 1843 ; Published by order of the U.S.Senate ; W.J. Stone sc.