Mentioned by Craig Weatherhill, in “Cornovia: Ancient Sites of Cornwall & Scilly” (Cornwall Books – 1985, revised 1997 & 2000) – “At 420m the summit of Brown Willy (the northern peak) is the highest point in Cornwall. On this northern peak is a Bronze Age stone cairn 25m across and 3.2m high, topped by a recent cairn and the Ordnance Survey triangulation pillar. To the south, half way along the hilltop ridge, is a second cairn 19m in diameter and 1.8m high.”