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This beautiful 1814 map, along with Pinkerton's similar map, is most likely the most important large format English atlas map of the American Southwest to be produced in the 19th century. The map depicts Mexico from the Yucatan north to what would soon become the Republic of Texas, the Louisiana Territory, and what would eventually be the U.S. States of New Mexico, Arizona, Texas, California, Nevada, Utah, Louisiana, Oklahoma and Colorado. This map is based largely on the maps of Alexander von Humboldt and Zebulon Pike. The general treatment of the Rocky Mountains is drawn directly from Humboldt important map of 1811, issued just 3 years prior. The 1806 - 1807 explorations of Zebulon Pike in modern day Colorado are also in evidence as is Pike's Peak, here noted as the "Highest Peak". The name Texas appears on this map only as the name of a settlement on the Colorado River, which is here mapped twice. The Great Salt Lakes is mapped according to the limited knowledge preserved from the Escalante-Onate expedition of 1776. Here both the Great Salt Lake and Utah Lake are mapped, both with indistinct borders. The Louisiana region is especially well notated with numerous annotations regarding the Indian tribes inhabiting the region and a number of advances over Humboldt - such as the correct mapping of the Arkansas River. Dated: Drawn and Engraved for Thomsons New General Atlas 1814. This is the first edition of Thomson's map from the 1814 edition of the Atlas. Subsequent editions were published in 1817 and 1826.
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