Find A Grave, database and images (https://www.findagrave.com : accessed 04 February 2018), memorial page for Helen Mary Brown Luce (Jan 1896–24 Nov 1944), Find A Grave Memorial no. 43109662, citing Woodlawn Cemetery, Norwalk, Huron County, Ohio, USA ; Maintained by Sedgwick2Graham (contributor 47075235) .
"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MSP8-V8C : accessed 4 February 2018), Mary H Brown in household of Fred E Brown, Milo Township Penn Yan village Ward 1-2, Yates, New York, United States; citing enumeration district (ED) 142, sheet 14B, family 370, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,241,179.
"United States Census, 1930," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:X4WV-J5X : accessed 4 February 2018), Helen M Luce in household of Clarence H Luce, Norwalk, Huron, Ohio, United States; citing enumeration district (ED) ED 20, sheet 19B, line 87, family 562, NARA microfilm publication T626 (Washington D.C.: National Archives and Records Administration, 2002), roll 1823; FHL microfilm 2,341,557.