"United States Census, 1850," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M88R-8VC : 12 April 2016), Margaret Martin in household of Sarah Ray, Brooke county, Brooke, Virginia, United States; citing family 850, NARA microfilm publication M432 (Washington, D.C.: National Archives and Records Administration, n.d.).
"West Virginia Marriages, 1780-1970," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:F1SW-88D : 11 February 2018), John Frazier and Margaret Martin, 24 Apr 1860; citing Wellsburg, Brooke, West Virginia, Page 8 line 17, county clerks, West Virginia; FHL microfilm 869,830.