On the next hill, the dreary one of Bartinney, is a monument of somewhat similar description [with a vallum and ditch], but it is in a sad state of ruin and nearly overgrown with turf and furze. The wide vallum that surrounded it can, however, be distinctly traced, as may be also the three circular enclosures near the centre, all mentioned and figured by Borlase.
There is a tradition that there were rows of seats on the inner side of the vallum, and that games or plays were performed in the centre.
According to another, hence came the giants of Bosworlas Lehau, when they were inclined for a little recreation.
From Rambles in Western Cornwall by the Footsteps of the Giants by J O Halliwell-Phillipps (1861).