River of Ohio. Historic map, Library of Congress

Scale ca. 1:2,000,000.
Manuscript, pen-and-ink and watercolor.
Has watermark.
Relief shown by hachures.
"No. 23."
Includes latitude readings at spots along the river and notes on the width of tributaries.
LC Maps of North America, 1750-1789, 782
Available also through the Library of Congress Web site as a raster image.
Vault
AACR2: 440; 651