Rögnvald had many romantic adventures in the prosecution of his attempt to obtain possession of half of the earldom held by Paul, which are detailed at length in the Saga. At last he was advised by his father Kol to make a vow to St. Magnus, that if he should succeed in establishing himself in the Orkneys he would build and endow a “stone minster” at Kirkwall, dedicated to St. Magnus, “to whom the half of the earldom rightly belonged.” The vow was made, and Rögnvald’s next expedition was successful. He landed in Shetland, and by a dexterous stratagem the beacons on Fair Isle and in the Orkneys were made to give a false alarm of his descent upon the Orkneys, so that when he did land there he was unopposed. Then he secured the intervention of the bishop, and an agreement that he should have half the Islands was concluded between him and Earl Paul. Shortly thereafter Earl Paul was captured by Swein Asleifson, a notable leader at that time in the Islands, and the last and greatest of the Orkney vikings. Swein carried the earl off in his vessel, and, landing him on the southern shore of the Moray Firth, delivered him into the safe keeping of Maddad, Earl of Athole,[37] who was married to Margaret, a sister of Earl Paul. What became of the earl is not known, “but this,” says the Saga, “is well known, that he came never again to the Orkneys, and had no dominions in Scotland.” Swein Asleifson returned to Orkney, and by the joint consent of Earl Rögnvald, Bishop William of Orkney, and Bishop John of Athole, Harald, the son of Maddad, earl of Athole, was made Earl, along with Rögnvald, though he was at that time a child of only five years old. This arrangement was afterwards confirmed by a meeting, held in Caithness, of the Bœndr and chiefs of the Orkneys and Caithness.