This is a larger scale, more detailed version of Sanson's 1644 map. Additional "real" placenames appear for the first time on a published map. The Native Americans of the Southwest are shown as four tribes, Apaches de Navajo, A. de Peryllos, A. Vaqueros, and A. de Xila; and, this is apparently the first published appearance of the word Navajo. Despite the new factual geographic information, which might lead one to believe that Sanson had seen a map derived from on-the-spot observation, his Rio del Norte still flows from a mythical lake southwesterly into the Gulf of California--his "Mar Vermejo"--and the Island of California conception has been retained.