Two of the stones (only one remaining) were decorated in antiquity with a series of concentric circles and a spiral.

[5] Given an 11-stone circle, about 18 feet in diameter, it might be that the internal cairn was part of the original structure.

[6] There is one boulder existing today that has a spiral on it linked into multiple concentric circles.

[7] The crispness of the cutting may suggest that the work was done shortly before the mound was made, thus preserving the artwork.

Two stones found in the cist (now in Penrith Museum), have cup and ring markings.