"Massachusetts, Town Clerk, Vital and Town Records, 1626-2001," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:Q2Q2-Z6S6 : 6 April 2020), Mary Driscoll in entry for Catherine Harrington Peters, 12 Jan 1911; citing Death, Boston, Suffolk, Massachusetts, United States, Massachusetts Secretary of the Commonwealth, Boston; FHL microfilm 007605161.
"Massachusetts Marriages, 1841-1915," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:N43V-9FB : 10 March 2021), Mary Driscoll in entry for Augustus Peters and Katherine E. Harrington, 9 Jun 1901; citing Boston, Suffolk, Massachusetts, United States, State Archives, Boston; FHL microfilm 2,057,534.
The dates in these sources do not match exactly with her daughter’s profile information, but they have so much information in common with it, that I believe they are likely sources. Even though Peters is a common last name, Augustus/Augustine, son of Fidelis/Fidele, is not very common. The odds seem especially slim that there would be two about the same age at the same time, in Boston, where both he and his spouse immigrated from the right countries. Augustus’ mother’s name is also correct in marriage document, first name and maiden name. -P. Clinesmith 12 Dec 2021.