On Mull or Meayll Hill, a mile north-east of the Calf Sound, Isle of Man, is the remarkable megalithic monument known as the Mull Hill Circle. It is not a stone circle of normal type but consists of six T-shaped structures, each comprising two rectangular cists averaging 5 ft. 9 in. by 2 ft. 8 in., placed end to end with the inner end of each open and forming the head of the T, and approached by a short passage about 7 ft. long at right angles (the upright of the T). These pairs of cists are arranged in a circle some 50 ft. in diameter; each group distinct, with the cists placed tangentially and the passages leading radially outwards. They are so spaced as to leave a larger interval between the groups on the north and south to form two opposite ‘entrances ’. Apparently the entire circle of cists had originally been covered by a ring of stones and earth, the whole forming a ‘disc-barrow’, the bank of which contained chambers. There are vague indications of a central chamber or cist. The stone used in the construction of the monument was a local slate. No capstones remain to any cists or passages, but all appear to have been paved with flat slabs.