The beginning of the nineteenth century saw a period of rapid market growth and innovation in the map publishing world. Increased literacy and public interest in new frontiers and colonies overwhelmed the market because it was oriented toward the small, affluent market of the previous century. With the intent to fill this void, The Society for the Diffusion of Useful Knowledge (SDUK) was founded in 1828 in London, by Lord Brougham and a group of men dedicated to the education of the aspiring working class and the Utilitarian ideal of 'Knowledge is Power.' The society produced an array of education materials, but the series of maps was one of their most successful ventures. A number of engravers and printers were used to produce the maps, which eventually exceed 200 sheets, and continued to be published after the Society as a whole ceased to function.

This detailed and finely engraved map portrays an Independent Texas in its largest configuration with Mexico controlling Nueva California to its west. The engraved border between Canada and the United States is shown along the Columbia River (a British viewpoint), but the colorist has followed the 49th parallel to the Pacific Ocean. The map is filled with well-developed topography, and names numerous forts, trading posts, and Indian tribes. The Great Salt Lake is not present, but L. Youla is located in its vicinity with the American Fur Depot on its eastern shore. The R. Buenaventura extends to the Pacific from two branches, one originating from a large swamp in the Great Basin. The course of the Snake River is fairly accurate, but the Colorado River originates too far north and rushes to the Sea of Cortez in a straight line. The map locates the 3 Butes, important landmarks on the Oregon Trail, in present-day Idaho. Lake Michigan retains its erroneous elongated shape. Engraved by J. & C. Walker and published by Charles Knight. This is an uncommon folding edition of this map.

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Condition: B

Issued folding with contemporary outline color. There is light toning along the fold lines and a short repaired edge tear confined to the bottom blank margin.