After several attempts I think I finally found this site a few weeks ago. It's in a wood near Conkwell, a few miles from Bath, grid ref. ST 797631 and shown as Jug's Grave Cairn on MAGIC. If I'm right it appears to consist of a main circular stone wall, presently without a roof, with several small chambers to the side of it. Trees surround the cairn with roots growing through the walls. Has anybody else visited this site (did I actually find the right place!) and does anyone have any idea as to the age, usage and possible connections to other sites in the Bath area?