Rev. Thomas Ruggles, Jr.'s Explanation of Sachem Head Harbor
. . .
Reverend Mr. Ruggles told me in the pursuit of Pequots, 1637, one of the sachems was overtaken at Long Point on south side of Sachem Head Harbor. He attempted to swim across the Chops but was taken and convicted in a court martial, shot by order by an Indian with arrow, and his head struck off and stuck up on the crotch of a great tree. Hence, the place called Sachem Head.