Anglo-Saxon Chronicle. 1016. After his decease, all the peers that were in London, and the citizens, chose Edmund king (age 26); who bravely defended his kingdom while his time was. Then came the ships to Greenwich, Kent [Map], about the gang-days, and within a short interval went to London; where they sunk a deep ditch on the south side, and dragged their ships to the west side of the bridge. Afterwards they trenched the city without, so that no man could go in or out, and often fought against it: but the citizens bravely withstood them. King Edmund (age 26) had ere this gone out, and invaded the West-Saxons, who all submitted to him; and soon afterward he fought with the enemy at Pen near Gillingham.

Anglo-Saxon Chronicle. After 23 Jun 1016. It was within two nights after that the king (age 26) went over at Brentford [Map]; where he fought with the enemy, and put them to flight: but there many of the English were drowned, from their own carelessness; who went before the main army with a design to plunder. After this the king (age 26) went into Wessex, and collected his army; but the enemy soon returned to London, and beset the city without, and fought strongly against it both by water and land. But the almighty God delivered them.

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.

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."

Anglo-Saxon Chronicle. On the feast of St. Andrew died King Edmund (age 26); and he is buried with his grandfather [his grandfather] Edgar at Glastonbury [Map]. In the same year died Wulfgar, Abbot of Abingdon; and Ethelsy took to the abbacy.