Purgatoire river Various names mentioned in Long's Expedition. Thwaites Early Western Travels v.16 p.74 Described by Abert in his Journal of A. W. Abert from Bent's Fort to St. Louis, 1845 (rare) C978.02 A147unm p.14 C978.02 A147gu p.21 Former names, meanings, description. FM Jan. 31, 1868 Origin of name. El Palacio Oct., 1943 p.229