The fort's layout included an eastern bastion and a flanking wall built amongst large naturally occurring boulders.[1] The fort was described as containing an enclosed chamber as well:
Within the fort a chamber – six square feet with a seven-foot ceiling and a sand floor – was perhaps built for the Narragansett queen Quaiapen (also called Matuntuck). She supposedly hid out at the site during King Phililp’s War before moving somewhere else, where she died. Some have also suspected that Quaiapen and Stonewall John were lovers."[3]
The fort was known for the skill of its design, which used naturally occurring boulders connected with laid stone walls. Admiring colonists created the mistaken rumor that Stonewall John was an escaped English engineer.[4]
^Malone, Patrick M. (March 1973). "Changing Military Technology Among the Indians of Southern New England, 1600-1677". American Quarterly. 25 (1): 48–63. doi:10.2307/2711556. JSTOR2711556.