"Ohio, County Marriages, 1789-2013," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XZ5P-GX4 : 8 December 2014), George Gadd and Hannah Vanfleet, 30 Mar 1826; citing Belmont, Ohio, United States, reference bk 2 p 29 no 48; county courthouses, Ohio; FHL microfilm 317,291.
"United States Census, 1850," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MX3D-425 : 9 November 2014), George Gadd, Roxbury, Washington, Ohio, United States; citing family 26, NARA microfilm publication M432 (Washington, D.C.: National Archives and Records Administration, n.d.).