Much of Einarr's story in the sagas appears to be derived from the five skaldic verses attributed to Einarr himself and it is not certain that this account Einarr's conquest is historically accurate. Though the "Historia Norvegiæ", written at the same time as the sagas but from a different source, confirms that Rognvald's family conquered the islands, it gives few details. The scene in the sagas where Einarr's father scorns him is a literary device which often figures in Old Norse literature. After Hallad's failure in Orkney the dialogue between the father and his sons has been interpreted as being about Rognvald's desire to cement his own position as Earl of Møre and an allusion to the early history of Iceland, where the sagas were written. Thorir is a compliant son who Rognvald is happy to keep at home. Hrolluag is portrayed as a man of peace who will go to Iceland. Einarr is aggressive and a threat to his father's position so can be spared for the dangers of Orkney. In the "Landnámabók" version the equally aggressive Hrolfr is also present, and his destiny is anticipated to be in conveniently far-away Normandy.