This miniature map of western Africa includes parts of present-day Gabon, Congo and Angola. Major towns and key topographical features are depicted. Lac Zaire is depicted, a mythical lake that was supposed to be the source of both the Nile and the Congo Rivers. Pierre Duval was Nicolas Sanson's nephew and pupil. He published a wide range of atlases and individual maps including a fine miniature world geography with many of the maps based on Sanson.
References: King (2nd ed) pp. 132-135; Pastoureau, Duval XI C.