Scarce map showing Texas and adjacent regions as they would have been in the 18th Century. The map was prepared by Herbert Bolton, one of the most prolific and important writer/scholars of the 20th Century.

The map shows the major Indian tribes and a meticulous accounting of 18th Century explorers' routes.

Herbert Eugene Bolton (1870 - 1953) was an American historian who pioneered the study of the Spanish-American borderlands and was a prominent authority on Spanish American history.

Bolton's major contribution to his field would come to be known as the Bolton Theory of the history of the America's, wherein Bolton believed that it is impossible to study the history of the United States in isolation from the histories of other American nations.

Bolton spent an important part of his career at the University of California, Berkeley where he served as chair of the history department for 22 years and is credited with making the renowned Bancroft Library the dominant research center it is today.

Bolton is also known to have made dozens of remarkable wall maps as study aids for his students, a number of which survive at the Bancroft.

Bolton's maps are quite scarce, this being the first example we have encountered.