Known as the Hag’s Chair in some contexts, K29 or the Mass Rock, in others, set as a Cairn T, Loughcrew kerbstone thousands of years ago the carved symbols on front, rear and seat are very worn. There is no surviving record to inform us of the stone’s purpose. The upper side appears carved to enhance the form as chair. Set to the north of Cairn T, not in front of the entrance as with Newgrange, even this is a mystery. Its is the third largest curbstone. The popular name refers to the hill itself, “The Hill of the Witch” (In Irish, Sliabh na Caillí). In lores sites such as this are associated with The Others (“fairies”), living lives parallel to ours. The popular name refers to the hill itself, “The Hill of the Witch” (In Irish, Sliabh na Caillí). In lores sites such as this are associated with The Others (“fairies”), living lives parallel to ours. Tradition holds that, during times of the Penal Laws, Catholics gathers on for Mass using this curbstone as the altar. By this it is known as the Mass Rock.