Alfred's Castle farmhouse was built within the abandoned prehistoric enclosure. King Alfred won a great victory against the Danes at the Battle of Ashdown, in AD 871. Being located just to the west of Ashdown House, Victorian antiquaries associated Alfred's Castle with the King's troop movements before the battle. The exact site of Alfred's battle has not yet been determined, however, so is a matter for debate. The most likely sites are near Compton and Aldworth in Berkshire. Excavations were carried out at Alfred's Castle from 1998-2000 by archaeologists from Oxford University, and post-excavation analysis is still ongoing (as of August 2011).
Battle of Ashdown historical novel by C. Walter Hodges. The battle is described in "The Last Kingdom" by Bernard Cornwell. There is also an account of a visit to the battlefield in "Tom Brown's Schooldays":- "And now we leave the camp, and descend towards the west, and are on the Ashdown. We are treading on heroes. It is sacred ground for Englishmen—more sacred than all but one or two fields where their bones lie whitening. For this is the actual place where our Alfred won his great battle, the battle of Ashdown ('Aescendum' in the chroniclers), which broke the Danish power, and made