Visited 25th May 2004: The Cairn next to Fowler's Arm Chair is much more obvious than the alleged stone circle it stands next to. We approached from the south and had a picnic lunch at the cairn. The weather was spectacular, but the scene was spoilt slightly by the constant sound of 2-stroke motorbike engines coming from across the valley.
This is a great cairn! It's chunky and well defined compared to many we've encountered. Thoroughly recommended as a picnic spot.
The NMR (available through Coflein) describes the site as, "a much disturbed disturbed cairn, 13m in diameter and 0.4m high, showing kerbstones to the NE (3) and S (1)". This doesn't really do the place justice.