"United States Census, 1850," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MD44-8D8 : 12 April 2016), Maryann Mason in household of Richard Mason, Baltimore, ward 3, Baltimore, Maryland, United States; citing family 1963, NARA microfilm publication M432 (Washington, D.C.: National Archives and Records Administration, n.d.).
"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MNQH-SLB : 15 August 2017), Mary A W Chase in entry for Geo B Chase, 1880; citing enumeration district ED 111, sheet 142B, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d), roll 0501; FHL microfilm 1,254,501.
"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MSV1-R41 : accessed 14 August 2019), Mary A W Chase in household of Clarence P Day, Borough of Manhattan, Election District 4 New York City Ward 21, New York County, New York, United States; citing enumeration district (ED) 517, sheet 16B, family 292, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,241,105.