Account of an expedition from Pittsburgh to the Rocky Mountains, performed in the years 1819 and 1820 : by order of the Hon. J.C. Calhoun, Secretary of War, under the command of Maj. S.H. Long, of the U.S. Top. Engineers : compiled from the notes of Major Long, Mr. T. Say, and other gentlemen of the party / by Edwin James, botanist and geologist to the expedition ; in three volumes.Clark, J., engraverHall, Sidney, engraverJames, Edwin, 1797-1861Long, Stephen Harriman, 1784-1864Say, Thomas, 1787-1834Seymour, Samuel, fl. 1797-1822, illUnited States. War Dept1823Aquatint engravings by J. Clark, after Samuel Seymour.For collation of plates, see Wagner, H.R. The Plains and the Rockies ... 1921, p. 95.Half-title: An expedition from Pittsburgh to the Rocky Mountains.Map engraved by Sidney Hall.Plates in copies 1 and 2 are bound in different order.Printed by A. & R. Spottiswoode, New-Street-Square.mixed material