With there being a possible boundary ditch south of the Tomb of the Eagles it is worth noting that an orthostatic slab south of the Banks Tomb is probably a boundary marker (RCAHMS NMRS record no. ND48SE 8 at ND459833, down as post-mediaeval though how they can be certain of one and not the other...). Also in the area Ronald Simison explored two out of six mounds at ND46128326 (ND48SE 4) both with kerbs and one apparently connected by a causeway to one of the others. He also found a kerb cairn at ND46338323 (ND48SE 3).