Alfred the Great necessary, that each man keep carefully his oath and his pledge" which expresses a fundamental tenet of Anglo-Saxon law. Alfred devoted considerable attention and thought to judicial matters. Asser underscores his concern for judicial fairness. Alfred, according to Asser, insisted upon reviewing contested judgments made by his ealdormen and reeves and "would carefully look into nearly all the judgements which were passed [issued] in his absence anywhere in the realm to see whether they were just or unjust". A charter from the reign of his son Edward the Elder depicts Alfred as hearing one such appeal in his chamber while
Alfred the Great with the Vikings, creating what was known as Danelaw in the North of England. Alfred also oversaw the conversion of Viking leader Guthrum. He successfully defended his kingdom against the Viking attempt at conquest, and he became the dominant ruler in England. He was also the first King of the West Saxons to style himself "King of the Anglo-Saxons". Details of his life are described in a work by 9th-century Welsh scholar and bishop Asser. Alfred had a reputation as a learned and merciful man of a gracious and level-headed nature who encouraged education, proposing that primary education be conducted