A description on the Waymarking site tells us that a cabin was built here in 1930 for members of the Potomac Appalachian Trail Club to use as a base camp while laying out trails in the area. In 1939, a larger version of the cabin was built by the National Park Service.
"The new cabin burned down to the ground on Thanksgiving Day, 1946, leaving the stone foundation and chimney. The hikers who had the cabin claimed to have left it, with all fires out, just ten minutes before a column of smoke was spotted from a lookout tower."