Sandstone slip gate piers are found at the bottom entry point to the Buchans field beside the pedestrian footpath. Such slip gates were built with a series of downward facing 'L'-shaped grooves on one side and a matching concavity on the other gatepost. Wood bars could then be inserted across and parallel, giving a gate without a hinge. These are sometimes still found in the countryside at large, but they are almost always adapted to carry metal hinged gates. In some areas wood rather than stone was used to construct this type of hinge-less gatepost.