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 they rejoiced to see him". Alfred's emergence from his marshland stronghold was part of a carefully planned offensive that entailed raising the fyrds of three shires. This meant not only that the king had retained the loyalty of ealdormen, royal reeves and king's thegns, who were charged with levying and leading these forces, but that they had maintained their positions of authority in these localities well enough to answer his summons to war. Alfred's actions also suggest a system of scouts and messengers. Alfred won a decisive victory in the ensuing Battle of Edington which may have been fought near