"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MMY2-Y1Y : accessed 2 September 2021), Gy N Butler in household of J H Butler, Gypsum Township, Sedgwick, Kansas, United States; citing enumeration district (ED) 262, sheet 8A, family 167, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,240,499.