Longfellow, A. W. (Alexander Wadsworth), 1814-1901. issued Jan. 1889 F.M. Thorn Superintendant, varified: B.A. Colonna, Assistant in charge of office. Depths shown by soundings in feet. Triangulation... U.S. Coast and Geodedic Survey.
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Bache, A. D. (Alexander Dallas), 1806-1867, Longfellow, A. W. (Alexander Wadsworth), 1814-1901, and Hilgard, J. E. (Julius Erasmus), 1825-1891. United States Coast Survey ; from a trigonometrical survey under the direction of A.D. Bache ; triangulation by C.O. Boutelle ; topography by A.W. ... U.S. Coast Survey [i.e. U.S. Coast and Geodetic Survey].