Anna HIGGINS wife of John Hubbard Burlington Flats Baptist Cemetery
There are two Anna Higgins. One born 17 Apr 1740 in Eastham, Barnstable, Massachusetts. There is a Barnstable on the plat map of Burlington Flats. Her parents were Beriah Higgins and Jemima Witherell. Familysearch has her indexed.
The other is born 6 June 1735 died Dec 1803 with parents David Higgins and Mercy Twining.
If you have cemetery information, maybe you have a birth date.
There was a posting that they were buried in the Baptist Cemetery in Burlington Flats.