↑ "Maine Vital Records, 1670-1921," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:KCD6-WX4 : 24 September 2017), Herman D Proctor and Bertha I Pettegrow, 06 Jul 1897; citing Machiasport, , Maine, United States, Division of Vital Statistics, State Board of Health, Augusta; FHL microfilm.
↑ "Maine, Faylene Hutton Cemetery Collection, ca. 1780-1990," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QKM1-QQS9 : 16 March 2018), Bertha I Proctor, 1915; citing Burial, Machiasport, Washington, Maine, United States, Maine State Library, Augusta; FHL microfilm 1,787,295.
"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MFQW-1PL : 15 August 2017), Bertha Pettigrove in entry for Mary Pettigrove, 1880; citing enumeration district ED 185, sheet 325C, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d), roll 0490; FHL microfilm 1,254,490.
"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MMGQ-ZNV : accessed 14 May 2019), Bertha Proctor in household of Charles S Pettigrew, Machiasport town, Washington, Maine, United States; citing enumeration district (ED) 212, sheet 8A, family 164, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,240,602.
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:MLZ6-KNM : accessed 14 May 2019), Bertha Proctor in household of Herman G Proctor, Rye, Rockingham, New Hampshire, United States; citing enumeration district (ED) ED 270, sheet 4A, family 92, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 866; FHL microfilm 1,374,879.