Genealogy of the Families of John Rockwell, of Stamford, Connecticut p. 287
United States Census, 1900, database with images, FamilySearch, Mary E Armstrong in the household of Colonel E Armstrong, Danbury city Ward 1, Fairfield, Connecticut, United States; citing enumeration district (ED) 54, sheet 5A, family 114, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,240,132.
United States Census, 1910, database with images, FamilySearch, Mary Armstrong in the household of Colonel E Armstrong, Danbury Ward 1, Fairfield, Connecticut, United States; citing enumeration district (ED) ED 61, sheet 13B, family 294, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 129; FHL microfilm 1,374,142.
United States Census, 1920, database with images, FamilySearch, Mary A Armstrong in the household of C Elsworth Armstrong, Danbury Ward 1, Fairfield, Connecticut, United States; citing ED 96, sheet 15A, line 24, family 340, NARA microfilm publication T625 (Washington D.C.: National Archives and Records Administration, 1992), roll 174; FHL microfilm 1,820,174.
Find A Grave, database and images FindaGrave, memorial page for Mary Keeler Armstrong (1868–1946), Find A Grave Memorial no. 39156756, citing Ridgebury Cemetery, Ridgefield, Fairfield County, Connecticut, USA ; Maintained by karen kelly (contributor 46967126) .
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