In describing the vitrified site of the Top of Noth in Strathbogie, Dr Hibbert speaks of “a lofty upright stone on the westerly flank of the hill, connected with which is a monstrous traditional story of its having been placed there by a giant, the print of whose heel in it is still visible.” Archaeologia Scotica, vol. iv. p.297.
Mentioned on p 82 of ‘Deliciae Literariae: A New Volume of Table-talk’, by Joseph Robertson, 1840. (online at Google Books)
The RCAHMS record describes this as a natural stone. A 1967 visit said it was a “large, much-weathered boulder, with a faint natural mark forming the outline of a boot print on its south face”.