"United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M9FK-5CJ : accessed 18 August 2021), Lydia G Allen in household of George W Allen, District 1 Princeton borough, Mercer, New Jersey, United States; citing enumeration district (ED) 53, sheet 1B, family 20, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,240,982.
"United States Census, 1910," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M5WH-2XX : accessed 18 August 2021), Lydia Allen, Cazenovia, Madison, New York, United States; citing enumeration district (ED) ED 6, sheet 5A, family 115, NARA microfilm publication T624 (Washington D.C.: National Archives and Records Administration, 1982), roll 987; FHL microfilm 1,375,000.
"United States Passport Applications, 1795-1925," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QKDJ-S6R2 : 16 March 2018), Lydia J M Allen, 1915; citing Passport Application, New York, United States, source certificate #12993, Passport Applications, January 2, 1906 - March 31, 1925, 280, NARA microfilm publications M1490 and M1372 (Washington D.C.: National Archives and Records Administration, n.d.).
"United States Passport Applications, 1795-1925," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QVJP-S94F : 16 March 2018), Lydia J Mcm Allen, 1916; citing Passport Application, New York, United States, source certificate #46764, Passport Applications, January 2, 1906 - March 31, 1925, Roll 348, NARA microfilm publications M1490 and M1372 (Washington D.C.: National Archives and Records Administration, n.d.).
"United States Passport Applications, 1795-1925," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:QV5Y-63KD : 16 March 2018), Lydia J M Allen, 1924; citing Passport Application, France, source certificate #365678, Passport Applications, January 2, 1906 - March 31, 1925, 2416, NARA microfilm publications M1490 and M1372 (Washington D.C.: National Archives and Records Administration, n.d.).