"United States Census, 1850," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:M6VQ-6S1 : 22 December 2020), Caroline Omen in household of Patrick Omen, Howland, Penobscot, Maine, United States; citing family , NARA microfilm publication (Washington, D.C.: National Archives and Records Administration, n.d.).
"United States Census, 1880," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:MFQ9-XV6 : 14 January 2022), Caroline E. Preble in household of Charles Preble, Grand Falls Township, Penobscot, Maine, United States; citing enumeration district , sheet , NARA microfilm publication T9 (Washington, D.C.: National Archives and Records Administration, n.d.), FHL microfilm .
"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MMLT-VKF : accessed 1 February 2022), Carol Preble, Enfield, Lowell & Passadunkeag towns, Penobscot, Maine, United States; citing enumeration district (ED) 99, sheet 1B, family 13, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,240,598.
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MR36-P5R : accessed 1 February 2022), Caroline E Preble, Lowell, Penobscot, Maine, United States; citing enumeration district (ED) ED 166, sheet 16A, family 11, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 544; FHL microfilm 1,374,557.