Bache, A. D. (Alexander Dallas), 1806-1867, Hilgard, J. E. (Julius Erasmus), 1825-1891, and Lee, Samuel Phillips, 1812-1897. U.S. Coast Survey. A.D. Bache, Supt. ; triangulation by J.S. Williams, J.E. Hilgard and Lieut J.P. Roy Assts. ; hydrography by the parties under th... Coast Survey Office.
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Harrison, A. M. (Alexander Medina), 1829-1881 and Hilgard, J. E. (Julius Erasmus), 1825-1891. triangulation by A.M. Harrison in 1863 ; topography [by A.M. Harrison] in 1867 and '68 ; hydrography by F.P. Webber in 1867 ; verified, J.E. Hilgar... Coast Survey Office.