According to Paul Pettit in “Prehistoric Dartmoor” IBSN 0-9515274-6-0
During World War II this monument was wrecked by troops traing on the moor. Today ONLY six stones stand to their full height . Four are fallen and broken; six are sad looking stumps, their tops deliberately knocked off and lying on the ground nearby. One substantial stone outside the circle remains a mystery. The magnificent site 1,450ft up can still be appreciated.