Collection search - West end of Lake Erie and Detroit River, from surveys under the direction of the Topographical. Bureau of the War Department in obedience to Acts of Congress requiring the survey of the northern and north western lakes. Triangulation by Lieut. J.N. Macomb...Hydrography & Topography of Lieuts. J.N. Macomb, J.C. Woodruff...under the orders of Lieut. Col. James Kearney, Corps Topl. Engrs 1849. [cartographic material]

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