An archaeological watching brief was maintained during the excavation of five small holes to allow the installation of survey markers. The location of each hole was chosen to fall within areas known to have been disturbed in previous archaeological excavations. None of the holes required the removal of turf beyond a depth of 140mm. The initial excavation of one of the holes revealed angular fragments of granite, and although it was thought almost certain that these stones were remnants of spoil or backfilled trenches from earlier works, a stone-free, adjacent position was found for the marker installed at that location to avoid potential damage.