Scale ca. 1:24,000. Title from verso. Title in manuscript catalog of Peter Force map collection: Harbour of Portsmouth, N. Hampshire. Title in LC's Maps of America: Chart of coast of New Hampshire, near Portsmouth and the Isles of Shoals. Manuscript; pen-and-ink and watercolor. Mounted on cloth backing. Relief shown by hachures. Depths shown by soundings. LC Maps of North America, 1750-1789, 874 Available also through the Library of Congress Web site as a raster image. Vault AACR2
Unknown author<span style="display: none;">Unknown author</span>
<a rel="nofollow" class="external free" href="https://www.loc.gov/item/79694562/">https://www.loc.gov/item/79694562/</a>