[ATLAS]. OLNEY, Jesse (1798-1872). A New and Improved School Atlas, to Accompany the Practical System of Modern Geography. New York: Robinson, Pratt & Co, ca 1831. 4to (296 x 240). 12 hand-colored engraved maps (2 double-page). (Some overall browning, a few mild spots.) Original printed wrappers (some staining and light wear); contemporary brown paper folding wrappers. The double-page map of the United States includes the Missouri Territory, encompassing present-day Montana, Wyoming, Kansas, Iowa, and the Dakotas. The Oregon Territory extends into present-day British Columbia.