"United States Census, 1870," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MN36-FCW : 12 April 2016), Ellen F Brandenburg in household of Danl Brandenburg, Maryland, United States; citing p. 18, family 126, NARA microfilm publication M593 (Washington D.C.: National Archives and Records Administration, n.d.); FHL microfilm 552,085.
"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MNQ2-LPW : 15 August 2017), Ellen F Coblentz in household of Martin C Coblentz, Middletown, Frederick, Maryland, United States; citing enumeration district ED 73, sheet 179B, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d.), roll 0509; FHL microfilm 1,254,509.