"Maryland Marriages, 1666-1970," database, FamilySearch (https://familysearch.org/ark:/61903/1:1:F4JS-QT5 : 11 February 2018), Robert C. Brien and Ann E. Tiernan, 18 Nov 1825; citing , Baltimore, Maryland, reference ; FHL microfilm 13,693.
"United States Census, 1830," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:XHPF-KS4 : 29 July 2017), Robert C Brien, Graceham, Frederick, Maryland, United States; citing 140, NARA microfilm publication M19, (Washington D.C.: National Archives and Records Administration, n.d.), roll 57; FHL microfilm 13,180.