1. Sketch showing the primary triangulation between Fire Island & Kent Island base lines, sections II & III : from 1833 to 1851 Yale Public content 1866. 2013-10-02T15:33:44Z. 2013-10-02T15:34:48Z. United States Coast Survey, issuing body. U.S. Coast Survey,Bowen & Co., lith. English. cartographic image. Public. Middle Atlantic States.