[EXPLORATION -- NORTHWEST TERRITORIES]. DEFLOT DE MOFRAS, Eugene. Exploration du Territoire de L'Orégon. Paris, 1844. 2 vols. 8o. 8 plates. Quarter-morocco (rubbing to extremities). -- JAMES, Edwin Account of an Expedition from Pittsburgh to the Rocky Mountains. Philadelphia, 1823. 2 vols. 8o (foxing). Contemporary calf (joints repaired). Graff 2188. -- SIMPSON, J. H., Captain. Report of Explorations across the Great Basin of the Territory of Utah. Washington, 1876. 4o. 17 plates, 6 folding diagrams, 2 folding maps (some tears). Half-morocco (upper cover detached). -- MORGAN, Dale, editor. Overland in 1846, Diaries and Letters of the California-Oregon Trail. Georgetown, 1963. 2 vols. 8o. Pictorial title pages and illustrations, 2 maps. Quarter-morocco. Slipcase. SIGNED. -- BAYLIES, Francis. Exploration of the Northwest Coast. Washington, 1826. 8o. Disbound. Portfolio. Howes B-264. -- PENDLETON, Nathaniel G. Military Posts--Council Bluffs to the Pacific Ocean. Washington, 1843. 8o. Cloth. Howes P-199. -- CROSS, Osborn. A report...of the march of the regiment of Mounted Riflemen to Oregon. [Washington, 1850]. 8o. A fragment containing pp. 125-240 and 301-316, 33 plates, 2 of which are folding (dampstaining, foxed). Modern leather. Howes C-923. -- WALLEN, Henry D., Captain. Report of: his expedition...from Dalles City to Great Salt Lake and back. Washington, 1860. 8o. Folding map. Modern cloth. Howes W-57. -- VICTOR, Frances Fuller. The River of the West. Live and Adventure in the Rocky Mountains and Oregon. Hartford, 1870. 8o. Frontispiece, 9 plates, numerous illustrations. Contemporary calf. -- MULLAN, John. Report on the Construction of a Military Road from Fort Walla-Walla to Fort Benton. Washington, 1863. 8o. 10 colored plates, 4 folding maps. Modern cloth. -- and 7 others. Together 20 vols. (20)