An excellent descriptive bibliographic collection of maps pertaining to the American Southwest, especially ones that have Texas in them. Jackson, a noted amateur cartographic historian I had the chance to meet shortly before his death, describes the maps not only in the Newberry, but other important charts as well. He provides catalog numbers, places they appear in print, the history behind the map, their context, evolution, and progression, and a million other things about them. It is an essential reference for those interested in the mapping of Texas before the founding of the Republic. ( )