MapA general & particular plan of the island of Castle William near Boston, shewing the works in their original & present state, together with sections thro' the same. Carried on and survey'd ... Scale 1:600; 50 ft. to an in. Manuscript, pen-and-ink and watercolor. Has watermarks. Relief shown by shading. Oriented with north toward the upper right. Imperfect: Hole in center. "No. 11." Includes index to points of interest, inset of "A general plan of the island of Castle William shewing its situation with respect to the adjacent islands," 1:6,000, and two cross section views. LC Maps...
- Contributor: Montrésor, John
- Date: 1771