Montresor, John, 1736-1799. CREATED/PUBLISHED [1771?] NOTES Scale 1:600, 50 ft. to an in. Relief shown by shading. Oriented with north toward the upper right. 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.