Egbert, not considering himself safe in England, in consequence of his having claimed the crown of Wessex (for he thought his rival might take him prisoner and put him to death), sought refuge at the court of Charlemagne, King of France. On the death of Beortric, so unhappily poisoned by mistake, Egbert came back to Britain; succeeded to the throne of Wessex; conquered some of the other monarchs of the seven kingdoms; added their territories to his own; and, for the first time, called the country over which he ruled, England.