2 maps on 1 sheet ; 30 x 25 cm. and 13 x 26 cm., sheet 56 x 36 cm.
The Bancroft Library
Relief shown by hachures and spot heights; depths shown by soundings. "Grave par S. Jacobs." From: Duflot de Mofras, M. Exploration du territoire de l'Oregon ... 1844, no. 16. "Les sondes expriment des m?etres." Prime meridian: Paris. Scale [ca. 1:296,250] (W 123?00?--W 122?12?/N 38?11?--N 37?23?). Scale [ca. 1:75,000] (W 122?53?--W 122?40?/N 37?53?--N 37?46?).
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