The dissensions in the north being appeased, he returned to Wessex, where he soon afterwards heard of the death of Sithric, who left two sons, Anlaff and Godfrid, by a former marriage. Athelstan, instead of disbanding his army, instantly retraced his march, and the two princes only avoided falling into his hands by a hasty flight, which gave him an opportunity of making himself master of all Northumbria, except the castle of York, which alone held out against him.
Although he had taken the precaution of placing garrisons in most of the cities, the conqueror was far from feeling himself secure in his new possessions. The sons of Sithric were still at liberty, as well as Reginald, another Danish prince, who had fled with them. It was not known what had become of the latter. Anlaff had fled to Ireland, whilst his brother, Godfrid, had found an asylum with the King of Scotland, Constantine, whom Athelstan immediately summoned to deliver him into his hands. Constantine being perfectly aware that he was not in a position to refuse anything to the victor at the head of a powerful army, promised to deliver the prince into his hands, and give him a meeting at Dacor; but whilst he was preparing for his journey, Godfrid made his escape, either through the negligence or connivance of Constantine, who, however, met Athelstan, accompanied by Eugenius, King of Cumberland. Athelstan admitted Constantine's excuses for the Danish prince's escape, but, if English historians are to be credited, obliged both the kings to do homage for their kingdoms.
Before Athelstan quitted the north, Godfrid made an attempt upon York, by means of the castle, where he had still some friends; but failing in the attempt, he put to sea, where for a long time he exercised piracy; and when wearied with that way of life, surrendered himself to the King of England, who received him kindly, and allowed him a handsome pension.
Anlaff, a prince of greater abilities than his brother, took better measures for his restoration. He had, as we have observed, retired into Ireland, where, being informed that the King of Scotland was displeased with Athelstan, he believed he might make use of the opportunity to persuade him to espouse his cause. To that end he passed over into Scotland, and intimated to Constantine that he had reason to fear the worst from the King of England; and represented to him that Athelstan, having by surprise seized upon Northumbria, without the least right, might proceed in the same manner with regard to Scotland, and therefore it was absolutely necessary to prevent him. To this he added the offer of a powerful aid from Ireland, assuring him, with that increase of strength, he might easily drive Athelstan out of Northumbria, and free himself from a troublesome and dangerous neighbour, by restoring that kingdom to the Danes, who would serve as a barrier against England. Anlaff found no great difficulty to prevail with the King of Scotland, who, being secretly exasperated at the arrogant reception he had met with, yielded readily to his suggestions, and incited the Welsh to keep the Saxon monarch engaged, whilst he and his new ally should invade Northumbria.
Athelstan, by his expedition, defeated all the measures of the King of Scotland; and directly he was informed of the motions of the Welsh, and the aid sent them by Constantine, he marched into Wales, and giving Howel, prince of the West Welsh, battle, obtained a complete victory, in consequence of which he augmented the tribute paid by him to England.
This war being thus happily concluded, Athelstan approached the borders of Scotland, to revenge himself on Constantine for assisting the Welsh. As soon as he passed over the borders he took some towns, and gave the Scots reason to dread more considerable losses. As Anlaff had not yet arrived with the promised supplies, Constantine durst not venture to engage alone in a war against a powerful enemy, who had already advanced so far in his dominions, and was in a condition to carry his conquests so much further. To gain time, therefore, until the Irish joined him, he sued for peace; and Athelstan readily granted his request, being extremely desirous to make that prince his friend, for fear he should countenance the insurrections of the Northumbrians. For this reason he restored to him all the places he had conquered in Scotland, in hopes of cementing, by this liberality, an alliance it was then so much his interest to cultivate. Some historians, however, affirm that Athelstan obliged Constantine to do him homage for Scotland; but the Scots peremptorily deny this, nor is there any good authority for the assertion.
Athelstan's generosity was not sufficient to prevent Constantine from pursuing the execution of his first projects. He rather hastened his preparations the more, being indignant that he was compelled to receive obligations from one whom he always considered as a most bitter enemy. Athelstan, meanwhile, had returned into Wessex, in the full hope of enjoying the repose which he expected his successes would have secured him. But he met with domestic calamities which gave him more anxiety than all the wars he had been engaged in.
One of those fawning flatterers, who are the curse of courts, persuaded the king that his legitimate brother Edwin was secretly conspiring against him. This accusation Athelstan, aware of the defect in his title to the crown, unhappily gave ear to, and affected to believe the charge, whether he did or not. The prince was arrested by his unnatural brother, who, fearing to put him to death publicly, had him conveyed on board a vessel without sails or rudder, and ordered it to be let drift away to sea.
It was in vain that Edwin protested his innocence. Athelstan was inexorable: the prince's real crime was in his birth, and that was the one the jealous monarch punished.
Edwin, to avoid perishing by hunger, cast himself into the waves, and was drowned.
No sooner was the object of his terror removed for ever, than remorse seized upon the murderer, who, to quiet his conscience, founded the Abbey of Middleton, in Dorsetshire, where masses were daily offered for the repose of the victim's soul.
Edwin's accuser had not reason long to rejoice at the success of his malicious calumnies; for one day, as he waited at table with the king's cup, one of his feet slipping, he would have fallen, had he not, by the nimbleness of the other, recovered himself. Whereupon he jokingly said, "See how one brother helps another!" which senseless jest cost him his life; as Athelstan, who overheard it, and considered it as a covert reproach addressed to himself, ordered him to be immediately executed; and thus, says the old chronicler, revenged his brother's death by that of his false accuser.
Whilst these things were passing at court, Constantine continued his preparations for the execution of the project