Collection search - Project for the permanent defence of the harbour situated at the south western extremity of Manitoulin Island, and contiguous to the Détour, Lake Huron. Surveyed and projected by (signed) H.R. Payne, Capt. R1 Engr., July 1815. Quebec 24th June 1816, G. Nicolls, Lt. Col. R. Engineers. (True copy) Engineers Drawing Room, Quebec. John B. Duberger, Royl. Eng, Sur. &c. [cartographic material]

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