dr. william kelso which is called in the trenches. that's a little extra and he takes you under the ropes so you get an up close and personal look from his perspective. >> how could something so precious be lost for so many years? bill: i think it was lost for the first hundred. nobody talked about it. there were travelers that came in here and there was to amend -- tremendous erosion on the west end of the island. then it became the story agreed upon. i think there was also a confederate earthwork here, a large earthen mound all over most of what we found. so there was no clue in the landscape that there was anything but a civil war for. a site like this, there are a rise and time changes. it was built as a bomb shelter for the confederate troops. they built this fort as a good position on the river to set up their big guns to stop the union from coming up the river. they built things where they could hunker down in case they were shelled. what you are seeing here, if you look closely, there is even some surviving would. this was bui