[ROCKY MOUNTAINS]. -- JAMES, Edwin (1797-1861). Account of an Expedition from Pittsburgh to the Rocky Mountains, performed in the Years 1819, 1820. London: Longman, Hurst, Rees, Orme and Brown, 1823. 3 volumes, 8o. Three frontispieces (two colored), five plates (one colored) and two folding maps (the first with old tape repairs on verso, some foxing to plates). Contemporary half calf, marbled boards (vols. II and III rebacked preserving original spines, hinges a bit weak); cloth slipcase. Provenance: Neva and Guy Littell (morocco booklabels). FIRST ENGLISH EDITION. -- FREMONT, John Charles. Narrative of the Exploring Expedition to the Rocky Mountains, in the Year 1842, and to Oregon and North California, in the Years 1843-44. London: Wiley and Putnam, 1846. 8o. Frontispiece, three plates and folding map (some foxing). Modern half morocco. FIRST ENGLISH EDITION. Howes F370. (Condition varies.) (4)