A detailed and cleanly drawn map of Illinois and the surrounding regions–including most of Missouri–issued by the Society for the Diffusion of Useful Knowledge (SDUK). This wonderful English enterprise was devoted to the spreading of up-to-date information and the enhancing of understanding. In Illinois, fifteen years after statehood, only sparse settlement exists in the northern third of the state between Chicago and Peoria. Planned canals are noted, in particular one marked as the linkage between the Gulfs of St. Lawrence and Mexico (ambitious but never really used). Lake Michigan’s depth is unknown, while Superior’s depth is clearly stated. Also of import is the mapping of part of the Sioux territory (Iowa) and Missouri (north of the Grand River). This map was issued before any settlement by white men occurred in those parts. The Black Hawk war ended and settlement began after the printing of this map, late in 1833. For Illinois, Iowa, and Missouri, then, this map is an excellent document of their early history.