The result of the battle of Corbridge-on-Tyne secured Reginald in his conquest of Danish Northumbria, where he was succeeded, upon his death, about three years later, by his brother Sitric, the Irish possessions [Sidenote: A. D. 921.] of the family reverting to Godfrey, who hastened to establish himself in Dublin.[67] The alliance of the new ruler of the Northumbrian Danes was courted by the neighbouring princes, and Athelstan, soon after his accession to the English throne, [Sidenote: A. D. 926.] bestowed his sister’s hand upon the powerful chieftain of the Norsemen; though upon the unexpected death of Sitric, who only survived this union for a few months, dying in the prime of life in 927, [Sidenote: A. D. 927.] the Saxon prince seized upon the opportunity for asserting his own authority over the province, annexing it at once to the English crown.[68] Olave Sitricson, the youthful son of the deceased king, escaped across the sea to Ireland; but Godfrey, who had quitted Dublin upon hearing of his brother’s death, endeavoured to enlist the co-operation of his ancient antagonist the Scottish king in an attempt to dispute the claims of Athelstan. Constantine, however, was not to be won over, and as the former supporter of the Northumbrian Saxons still preferred the alliance of the English king to a hazardous confederacy with the Danish adventurer, Godfrey, after a vain attempt to establish himself in York, once more left the English shores and returned to rule over the Irish Norsemen.[69] The subsequent union of Olave Sitricson[70] with a daughter of the Scottish king endangered that alliance between the two princes which Godfrey had failed to disturb, and from this moment Constantine became an object of suspicion to his southern neighbour. [Sidenote: A. D. 934.] The unwonted spectacle of an English army appeared before long upon the Forth; and though the whole of this interesting epoch in the annals of Saxon England is enveloped in uncertainty and confusion, from the coincidence of this expedition with the death of Godfrey in Ireland, it may be conjectured that it was the policy of the English king to prevent any movement on the part of his former ally Constantine, in support of the claims of Olave, now the head of the Hy Ivar family, upon the Northumbrian possessions of his father’s family. Fortreim, as usual, was the suffering province, and the army of Athelstan, penetrating as far as Forteviot, the ancient capital, wasted the country in every direction, whilst a powerful fleet, sweeping the coast to the distant shores of Caithness, prevented the arrival of any assistance from Ireland. The limits of the incursion were now reached; and by frustrating the projects of Constantine and his new allies, its object was probably attained, though the success of Athelstan was merely temporary, and three years later the storm, which had thus been averted for a season, burst in all its fury on the English coasts.[71] [Sidenote: A. D. 937.]