Battle of Edington Guthrum, with two other unnamed kings, "departed for Cambridge in East Anglia". He made several attacks on Wessex, starting in 875, and in the last nearly captured Alfred in his winter fortress at Chippenham. By 878, the Danes held the east and northeast of England, and their defeat at the Battle of Ashdown had paused but not halted their advance. Alfred the Great had spent the winter preceding the Battle of Edington in the Somerset marsh of Athelney, the nature of the country giving him some protection. In the spring of 878, he summoned his West Saxon forces and marched
Battle of Ashdown the surrounding countryside. Alfred reputedly took his favourite white mare and rode up onto Blowingstone Hill (near Kingston Lisle), where stood an ancient perforated sarsen stone, called the "Blowing Stone". Anyone with the appropriate skill could generate a booming sound from this stone, by blowing into one of its holes. Alfred took a deep breath and was able to sound the alarm across the downs. All over the surrounding country, men were woken and gathered to defend their homes. In late 870, King Ethelred led the army of Wessex against the Danes in their stronghold at Reading. The attack failed,