The Saxons fought valiantly, led by the king and Prince Alfred; but being wholly undisciplined and unaccustomed to war they were unable to withstand the onslaught of the Danes, who fought in better order, keeping together in ranks: after four hours' hard fighting the Saxons were compelled to fall back.

They rallied again a few miles from Reading. Ethelred and Alfred went among them bidding them be of good cheer, for that another time, when they fought in better order, they would gain the victory; and that their loss had not been greater than the Danes, only that unhappily the valiant Ealdorman Aethelwulf had been slain. Fresh messengers were sent throughout the country bidding all the men of Wessex to rally round their king, and on the fourth morning after the defeat Ethelred found himself at the head of larger forces than had fought with him in the last battle.

The Danes had moved out from Reading and had taken post at Ashdown, and as the Saxon army approached they were seen to be divided into two bodies, one of which was commanded by their two kings and the other by two jarls. The Saxons therefore made a similar division of their army, the king commanding one division and Prince Alfred the other.