It is impossible to tell what this gravestone actually read when the cemetery was surveyed for the Hale Collection in the 1930s.
The first two lines are: "In memory of/ Mrs Hannah Gallup.../"
The current Gallup (2009) genealogy states (on page 96) that she was born in Mason's Island, in Mystic, New London, CT on 10 June 1726 and died 24 Jan 1808. (Brian Zoldak was correct.) This probably means that this gravestone was in partially unreadable condition during the Hale Collection survey.
As you saw from my blog post of her husband, Hannah MASON was a direct descendant of Capt. John Mason. Her parents were Nehemiah MASON and Zerviah STANTON (Joseph, John, John) [Stanton genealogy p. 146). She was the mother of 6 children.