 After the Early Neolithic , the long barrow fell into a state of ruined <unk> , perhaps experiencing deliberate deposition in the late medieval period , either by Christian <unk> or treasure hunters . Local folklore grew up around the site , associating it with the burial of a prince and the countless stones motif . The ruin attracted the interest of <unk> in the 19th century , while archaeological excavation took place in the early 20th . After limited reconstruction , in 1926 ownership was transferred to heritage charity The National Trust . It is open without charge to visitors all year around . 
