From the record
“Unnamed Battery No. 1 is an historic artillery battery located at Clark's Point, James Island, Charleston County, South Carolina. It was built in 1862 and was the southern end of the eastern James Island line.”
Wikipedia article Unnamed Battery No. 1, CC BY-SA 4.0.
One of 227 National Register listings published here for Charleston County · listed in 1982 · category: Structure.
Sources: the Wikipedia article · the case file at the National Archives · the National Register database, National Park Service

