There was a fortified trading post built by John Watts of the Dorchester Company in 1627. It was about 1 mile north of Frankfort Island and is now completely under water.
The Dorchester Company was founded in 1623 by a group of merchants who wanted to establish trade in the New World. They sent 14 fishermen where they established an outpost at Cape Anne Massachusetts called Gloucester. I’m still searching for a connection here.
Thomas Tricky ran a ferry to Bloody Point in Newington to Hilton Point in Dover, connecting the three areas. He ran the ferry for 25 years and provided service until a bridge was built from Bloddy Point to Hilton Head park.