Comments NMR & SMR ref is from Breton - "A cist within a double circle of fallen stones" Breton is known to be inaccurate. Not found by OS in 1979 - the area is marshy. Possibly the same as SMR SX 56 NE/24, NMR SX 56 NE 75?
References HER/SMR number 3504 SX 56 NE/179.
NMR number 438729 SX 56 NE 80. The information is from Breton OS 6" map collection 1950.