A general and particular plan of the island of Castle William near Boston. Shewing the works in their original and present state, together with sections through the same. Carried on and survey'd under the direction of, and by Iohn Montrésor, Esqr:, engineer extraordinary and Capt. Lieut:; by order of the Honble. Thomas Gage, Esqr:, Lieut: General and Commander in Chief of His Majesty's forces in North America &c. New York, 16th Jany: 1771.