There's a listing in the Pittsford, Vermont death records for a Francis Ducette who died in 1881. Perhaps this is her as a mis-transcription of Mrs. Francois Ducette? You can see the listing for free at FamilySearch.org:https://www.familysearch.org/ark:/61903/3:1:3QS7-899L-JH8?i=34&wc=Q8ZY-DPS%3A324711701%2C325088501%2C1583516108&cc=1987653