found: Block Island, Rhode Island, 1888:map recto (F.M. Thorn)
found: OCLC, May 24, 2006(hdg.: Thorn, F. M.; usage: F.M. Thorn)
found: Pacific Coast from San Francisco Bay to the Strait of Juan de Fuca, 1888:map recto (F.M. Thorn, Superintendent; U.S. Coast and Geodetic Survey)
found: Report of the Superintendent of the U.S. Coast and Geodetic Survey, showing the progress of the work during the fiscal year ending with June, 1887:p. iii (F.M. Thorn) p. 116 (Frank M. Thorn, Superintendent, U.S. Coast and Geodetic Survey)
found: WwW in Am., 1961-1968(Thorn, Frank Manly, lawyer; b. Dec. 7, 1836; supt., U.S. Coast and Geod. Survey, Washington, July 23, 1885-June 30, 1889; deceased)
