John of Worcester. 27 Jul 1054. Siward (age 44), the stout earl of Northumbria, by order of the king (age 51) entered Scotland, with a large body of cavalry and a powerful fleet, and fought a battle with Macbeth (age 49), king of the Scots, in which the king was defeated with the loss of many thousands both of the Scots and of the Normans before mentioned; he then, as the king had commanded, raised to the throne Malcolm (age 23), son of the king of the Cumbrians. However, his own son and many English and Danes fell in that battle.

Anglo-Saxon Chronicle. 27 Jul 1054. This year went Earl Siward (age 44) with a large army against Scotland, consisting both of marines and landforces; and engaging with the Scots, he put to flight the King Macbeth (age 49); slew all the best in the land; and led thence much spoil, such as no man before obtained. Many fell also on his side, both Danish and English; even his own son, Osborn, and his sister's son, Sihward: and many of his house-carls, and also of the king's, were there slain that day, which was that of the Seven Sleepers.