1860. Date of copyright registration 1858. Longitude west from Greenwich and Washington, D.C. Map of Minnesota contains inset map of "Vicinity of the Fal... [ J.H. Colton & Co.?]; New York?.
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1876. Nicholson, W. L. (Topographer). Longitude west from Washington, D.C. Stated on map: "Designed and constructed under the orders of Postmaster General Marshall Jewell and Second Ass... Post Office Dept.; Washington, D.C.?.