The mound itself is named Dingieshowe and was used as a meeting place for Vikings.
The mound was excavated by J Farrer and G Petrie who reported that it had a wall thickness of 12ft and an internal diameter of 33ft, the mound is about 25ft high. It is thought to be an Iron Age broch structure. The report of Farrer and Petrie states that a number of stone implements and several fragments of pottery were found. Petrie also records that ‘on digging underneath the foundations…it was found that the whole of that part of the sandy knoll on which it was built had been subjected to the action of a strong fire and considerable quantities of burnt bones of large animals were found’.
In typical antiquarian style they excavated from the top down leaving a dent in the top of the mound, this is a common sight across Orkney. It is also likely they put in a small trench in the bottom of the hill to find the burnt layer under the foundations (25ft is pretty deep to dig top down).