"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MQMW-24K : accessed 2 October 2020), Hugh Hagin, Precinct 3 Denver city Ward 13, Arapahoe, Colorado, United States; citing enumeration district (ED) 110, sheet 9A, family 205, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,240,122.