Scale ca. 1:890,000. Hand colored. Relief shown pictorially and by hachures. Depths shown by soundings. Prime meridian: New Orleans and Ferro. Shows historic points of interest. Includes descriptive notes and "Depths of the Mississippi." LC Maps of North America, 1750-1789, 780 Available also through the Library of Congress Web site as a raster image. col. map 113 x 35 cm.