Find a Grave, database and images (https://www.findagrave.com : accessed 18 April 2021), memorial page for Henry A. Mayou (1888–1956), Find a Grave Memorial no. 139062191, citing Saint Aloysius Cemetery, Springfield, Hampden County, Massachusetts, USA ; Maintained by Bruce Shappy (contributor 48234703) .
“Massachusetts Marriages, 1841-1915," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:N48L-9P4 : 10 March 2021), Henry A Mayon and Alvina Peet, 29 Jun 1909; citing Clinton, Clinton, Worcester, Massachusetts, United States, State Archives, Boston; FHL microfilm 2,315,510.
“United States Census, 1900," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:M9BM-SK5 : accessed 18 April 2021), Henry Mayow in household of Alphons Mayow, Clinton town (southeast part), Worcester, Massachusetts, United States; citing enumeration district (ED) 1597, sheet 6A, family 114, NARA microfilm publication T623 (Washington, D.C.: National Archives and Records Administration, 1972.); FHL microfilm 1,240,691.