One gravestone, two memorial pages. The first reads the age at death as 86, so says she is born in Massachusetts 5 May 1763. The second reads the age at death as 26 so says she is born 5 May 1823. I read it as 76 y. Which begs the question, if you don't know the birthdate, could the birth location possibly be correct? In any case, the death date given here appears incorrect.