"United States Census, 1790," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XHK1-CKD : accessed 28 December 2021), John Birke, Surry, North Carolina, United States; citing p. 522, NARA microfilm publication M637, (Washington D.C.: National Archives and Records Administration, n.d.), roll 7; FHL microfilm 568,147. 2 m >16, 3 f all ages
"United States Census, 1800," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XHRD-7YY : accessed 28 December 2021), John Burck, Salisbury, Surry, North Carolina, United States; citing p. 635, NARA microfilm publication M32, (Washington D.C.: National Archives and Records Administration, n.d.), roll 32; FHL microfilm 337,908.