How can I get an original source aligned with the indexed info.?
The indexed version of the death certificate for Frances E Cummings, fits another death certificate, not Frances's. All the indexes seem to be off. Here is the source:
"Massachusetts, Town Clerk, Vital and Town Records, 1626-2001," database with images, FamilySearch (https://www.familysearch.org/ark:/61903/1:1:FH47-SS4 : 10 November 2020), Ellen Cummings Barry, 17 Feb 1903; citing Death, Boston, Suffolk, Massachusetts, United States, Massachusetts Secretary of the Commonwealth, Boston; FHL microfilm 007009424.