Anglo-Saxon Chronicle. 18 Oct 1016. When the king (age 26) understood that the army was up, then collected he the fifth time all the English nation, and went behind them, and overtook them in Essex, on the down called Assingdon; where they fiercely came together. Then did Earldorman Eadric "Streona aka Acquisitive" Mercia as he often did before-he first began the flight with the Maisevethians, and so betrayed his natural lord and all the people of England. There had Knute (age 21) the victory, though all England fought against him! There was then slain Bishop Ednoth, and Abbot Wulsy, and Alderman Elfric, and Alderman Godwin of Lindsey, and Ulfkytel of East-Anglia, and Ethelward, the son of Alderman Ethelsy⁵⁹. And all the nobility of the English nation was there undone! After this fight went King Knute (age 21) up with his army into Glocestershire, where he heard say that King Edmund (age 26) was. Then advised Earldorman Eadric "Streona aka Acquisitive" Mercia, and the counsellors that were there assembled, that the kings should make peace with each other, and produce hostages. Then both the kings met together at Olney, Buckinghamshire [Map], south of Deerhurst, and became allies and sworn brothers. There they confirmed their friendship both with pledges and with oaths, and settled the pay of the army. With this covenant they parted: King Edmund (age 26) took to Wessex, and Knute (age 21) to Mercia and the northern district. The army then went to their ships with the things they had taken; and the people of London made peace with them, and purchased their security, whereupon they brought their ships to London, and provided themselves winter-quarters therein.

Note 59. There is a marked difference respecting the name of this alderman in MSS. Some have Ethelsy, as above; others, Elfwine, and Ethelwine. The two last may be reconciled, as the name in either case would now be Elwin; but Ethelsy, and Elsy are widely different. Florence of Worcester not only supports the authority of Ethelwine, but explains it "Dei amici."

On 18 Oct 1016 Battle of Assandun was fought between the Danish army of King Canute of England (age 21) and the English army commanded by King Edmund "Ironside" I of England (age 26) who was defeated. Following the battle King Edmund "Ironside" I of England (age 26) was compelled to agree to King Canute of England (age 21) reigning over all Engliand except Wessex, and to mutual succession ie one will succeed whoever dies first.