"United States Census, 1870," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MNZ6-FFS : 17 October 2014), David Silas in household of David Silas, Florida, United States; citing p. 23, family 2, NARA microfilm publication M593 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 545,629.