"Maine Vital Records, 1670-1921," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:2:99WX-6GZB : 2 March 2021), Entry for Perley J Whitten and Cora L Hunter, 26 Oct 1889; citing Pittsfield, , Maine, United States, multiple sources, Maine; FHL microfilm.
"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MMG9-8FG : accessed 15 July 2022), Cora L Whitten in household of Perley J Whitten, Pittsfield town Pittsfield village, Somerset, Maine, United States; citing enumeration district (ED) 161, sheet 5B, family 108, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,240,600.
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MR3J-P73 : accessed 15 July 2022), Cora L Whitten in household of Pesley J Whitten, Pittsfield, Somerset, Maine, United States; citing enumeration district (ED) ED 235, sheet 13B, family 321, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 546; FHL microfilm 1,374,559.