The front wall of this tomb protrudes 0.45m into a field from a broad drystone field boundary 190m WNW from the farm of Arns (at NS 8058 7557). Here it is in the slight W/E depression of a young stream with a very restricted view to the south, where the doorway is situated. Arns was part of a larger estate, based just 650m to the south at Garbet, owned by the Melville family and it is assumed that it is their family burial ground.
Illus: The view from up the tree.
The walled enclosure measures 6.55m W/E by 6.55m N/S internally. The walls are of quarried sandstone, 0.5m thick, capped by thin copestones. These possess a square outer edge at the foot of a chamfer with a slight incline to the rough internal edge. Only the southern corners have backset margins. The interior is levelled up and the walls rise a further 1.8m. Owing to the ground sloping down to the north, the north-east corner is 2.3m tall on the outside. The doorway is 0.94m wide between the stobs, which are 0.15m broad and 0.4m deep. No lintel or inscriptions were observed.