An early and nicely detailed examination of Portland Harbor surveyed under the direction of Lt. Col. John Anderson. Drawn by Lt. B. Poole and engraved by J. V. N. Throop. It shows town grids for Portland and generalized areas for Mount Joy, Cumberland, Oxford Canal and Cape Elizabeth. Includes various geographical points, coves, ledges, islands, etc. Names the Cumberland and Oxford Canal, the Observatory on Mount Joy, Fort Preble at Stoney Point, and more. A rarely seen issue.