The map only shows one ‘tumulus’ but actually there are three round barrows here and some stones. The round barrows are, as you’d expect, Bronze Age, but it may be that the stones come from an earlier Neolithic long-barrow. The area contains (judging by the map) the confluence of two little streams – if that’s of any significance.
According to L and R Adkins’s field guide to Somerset Archaeology, there are two red sandstone stones nearly 2m long, and two smaller ones. The site was excavated in 1931, when they found what could have been socket holes for the larger stones, and a number of smaller stones – so perhaps it could have been the entrance to a long barrow, though no burials were found here. A female urn cremation was found in one of the round barrows.
Past names for the site have been Grabburrows (’grave barrows’), Gradborough, and Bytelgore.