Up to the last generation there was a widespread belief that [megalithic] monuments could not be measured, nor the stones which composed them counted. Hence the name of “The Countless Stones” for the destroyed Lower Kits Coty, and as proof of their uncountability the story is told of a clever baker who placed a bread roll on each stone, thinking that when he collected his rolls again he would have the hidden number. His ingenious trick was in vain, however, for the Devil ate some of the rolls and then sat gibbering at the discomfited baker.
From ‘Notes on the Folklore and Legends Associated with the Kentish Megaliths, by John H. Evans, in Folklore, Vol. 57, No. 1. (Mar., 1946), p38.