Only about 320 m down a slight hill from the Brothers' Stones is this massive irregular lump of a monolith. It's 2 m high by around the same in it's greatest width. One of the major axis is aligned NNE/SSW. There is a great notch at the top through which to view the Brothers' Stones. Taken with these pair, this monolith forms a huge triangle on Brotherstone Hill and the walk from here, back up to those pair is like passing through a megalithic gateway.
An entry from Ancient Stones, an online database that covers most of the standing stones, stone circles and other stones found in South East Scotland. Each entry includes details, directions, photograph, folklore, parking and field notes on each location.