The excavations later revealed the remains of a Neolithic crannog. The dwelling was constructed on stilts on a man-made island away from the lake shore in water up to 10 feet (3.0 m) deep. Oak timbers had been “skillfully” cut with stone or flint axes to form stilts, of posts and poles, which “probably” rested on three parallel fully-grown tree ‘sleeper beams’, up to 3 feet 3 inches (1 m) wide, laid horizontally on the lakebed. Timbers from the structure were radiocarbon dated to 4867 years before present (BP).