Kashnor notes, "This is one of the earliest maps to define the Gulf of California, which is shown with continuous coastline, and locates the Colorado. The highest point reached on the North-West is Cape Blanco." This is a later copy of L'Isle's 1714 map, see 105:230M, 105:321M. Kashnor dates as ca. 1730. MS note: c.1730. Prime meridian: Ferro. Relief: pictorial. Projection: Conic. Printing Process: Copper engraving. Verso Text: MS note: 232.
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