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 the River Lea, follow the Lea to its source (near Luton), from there extend in a straight line to Bedford, and from Bedford follow the River Ouse to Watling Street. In other words, Alfred succeeded to Ceolwulf's kingdom consisting of western Mercia, and Guthrum incorporated the eastern part of Mercia into an enlarged kingdom of East Anglia (henceforward known as the Danelaw). By terms of the treaty, moreover, Alfred was to have control over the Mercian city of London and its mints—at least for the time being. The disposition of Essex, held by West Saxon kings since the days of