The seventh edition known as the “Treaty Map.” This map was “the official cartographic reference consulted in negotiating the peace treaty of February 2, 1848, which terminated the Mexican war…” (Martin). The first of seven issues in 1847, this is easily identifiable by having only two inset maps in the Gulf of Mexico (later issues have four). The twelfth edition was also used as a treaty map. This copy folds into red cloth covers 15×10, with “Mexico” stamped in gold, and with “Statistics of the Republic of Mexico” pasted on the inside front cover. Signature of Cornelius S. Van Alstine, U.S. Navy, on verso of map. Streeter refers to this seventh edition as “the most important edition of the Disturnell map.” Map is in full color.