From the June 17, 2015, State Port (NC) Pilot "Archaeology students continue to uncover history at Fort Caswell. by Lee Hinnant.
Fort Caswell was built in 1827 and now 17 college students and several volunteers are completing weeks of careful digging, scraping and sifting of earth in and around the old fort. Their efforts have paid off in finding one of the four walled rifle tunnels leading away from the fort. They were built during the Civil War to give Confederate soldiers a shielded place to leave the fort and fire on Union troops in case the fort was attacked.
They are looking for the fort's original cistern which collected water.
They have also unearthed the fort's original water-filled moat that surrounded it.