Reprint, including facsimile of t.-p., of London edition of 1823 of his "Account of an expedition from Pittsburgh to the Rocky Mountains, performed in the years 1819, 1820. By order of the Hon. J. C. Calhoun, Secretary of War, under the command of Maj. S. H. Long ... Comp. from the notes of Major Long, Mr. T. Say, and other gentlemen of the party."