par A. H. Brué, Géographe du Roi ... The map contains one of the earliest obtainable depictions of the route of Jedediah Smith. The Route de Smith en 1826 connects Lac Teguayo, to the R. Adams, Rock Salt Cavern and Seeds-Keeder River and San Diego and then extends north to M. St. Joseph. The information was derived from a letter from Smith published in the Nouvelles Annales des Voyages in 1828. Wheat notes that the Brue's attempt to actually depict Smith' route without Smith's map was a shot in the dark, but nevertheless makes Brue's map "one of the foundation stones of western mapping history…." Relief shown by hachures. Latitudinal and longitudinal lines. Coordinates approximate and based on Greenwich meridian. Includes legend indicating politcal boundaries. 6 bar scales on map, e.g. "Myriamètres." Shows topography, drainage, political boundaries, cities and towns. Features Native American territories (e.g. Pawnees, Sioux), as well as Russian possessions. Descriptive text throughout. "Dédiée à l'Académie Royale des Sciences de l Institute de France." Decorative border and ornate font for title. Inset maps: Détails des environs de Mexico et de La Vera-Cruz. Scale [approximately 1:2,800,000] -- Complément de la carte donnant le Yucatan et une partie des provinces unies de l'Amérique Centrale. Scale [approximately 1:4,800,000].