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Annual Report 1859. No. 2 (A bis) Sketch A Shewing the progress of the Survey in Section No. 1 From 1844 to 1859. Sub Sketch Showing the Triangulation East ofPenobscot Bay Maine. Sub Sketch Showing the position of Davis' ShoalDiscovered by the U.S. Coast Survey in 1846 (Image credit: United States Coast Survey Annual Report 1859)