Killed During King Phillip's War
It seems that the DAR Chapter listed on it must have "rescued" it around 1921.
As you can see the original top part (which was above ground) seems intact and the part below the year, that used to be below ground must have been cleaned and the DAR chapter and date inscribed on it.
Then, they embedded it in the rock and put it back in the cemetery.
This Web page reports that Edward's mother was the Anne Hutchingon that was expelled from the Massachusetts Bay colony. The story of Captain Edward Hutchinson is widely known and there is a page about him authored by by John Buczek. (Wikipedia page)