Under the date 1136 the Saga of Earl Rögnvaldr and Sveinn gives an account of the great Yule feast which Earl Páll prepared at his Bú, which is called Örfura (Jorfiara, "Flatey Book"); thither he asked many high-born men, including Valþjófr, Ólaf's son from Stronsay.  The Saga goes on to relate how Valþjófr and his crew were all lost in the West Firth the day before Yule, and how his father, Ólaf, was burned in his house at Duncansby the second night before Yule, in the absence of his wife Ásleif and his sons Gunni and Sveinn, afterwards called Ásleifarson.  Sveinn returned home on the eve of Yule, and at once fared to Stroma, which he reached in the night, and from thence he went to Skalp-eið, and so on to Örfura, which he apparently reached on the first day of Yule... (The Saga-book of the Viking Club, v.3, 1902).