This mammoth wall map of the United States was originally published in 1834. It was significantly revised at the beginning of the Mexican War in 1846 by the addition of the important inset map of the Transmississippi West entitled A New Map of Texas, Oregon and California. This new inset, which replaced the old inset General Map of the United States, was also separately issued as a pocket map, and was one of the first maps of the Transmississippi West. Rumsey believed that the inset was the first printing of the map, with the separately issued version published later (see 534). The inset was continued on this 1849 edition, with a slightly different title. The 1849 edition is scarce. Rumsey (538) lists only the 1846 edition, and Phillips' America (p. 901) lists only an 1851 edition. This copy is particularly handsome in that each existing county for the entire nation has been separately colored.