Vale of White Horse being removed to show the white chalky soil beneath. This figure gives name to the hill, the range and the Vale. It is 114 m (374 ft) long and highly stylised, the neck, body and tail varying little in width. The origin of the figure is unknown. Tradition asserted it to be the monument of a victory over the Danes by King Alfred, who was born at Wantage, but the site of the Battle of Ashdown (871 CE), has been variously located. Moreover, the figure has been dated to the Bronze Age, so it pre-dates the battle by many centuries.
Ailill mac Dúnlainge (died 871) his camp was attacked by the Laigin who were at first successful, but in a counter-attack they were put to flight. Ailill's name is not connected with these events which state that Muiredach mac Brain was the King of Leinster who fought the forces of Cerball. The "Fragmentary Annals" give a lengthy account of this event and state that Cerball met up with the high king's forces at Belach Gabrán (the pass of Gowran in east-central Osraighe) but both forces then retired and the hostages of the Laigin were not taken. In 871 Ailill was killed by the Vikings of