One possible reason for Fergus's apparent lack of further participation in Anglo-Scottish affairs may have been due to events in the Isles. Although the thirteenth- to fourteenth-century "Chronicle of Mann" portrays Óláfr's reign as one of tranquillity, a more accurate evaluation of his reign may be that he adeptly managed to navigate an uncertain political climate. In regard to Fergus, the acquisition of the Dublin kingship in 1142, by the Islesman Ottar mac meic Ottair, may well have represented a threat to the authority of Óláfr, and the prospects of Fergus's grandson. By the mid part of the twelfth century, however, the ageing Óláfr's realm may well have begun to buckle under the strain, as perhaps evidenced by the depredations wrought on the Scottish mainland by Óláfr's leading ecclesiast, Wimund, Bishop of the Isles. Confirmation of Óláfr's concern over the royal succession may well be preserved by the chronicle, which states that Guðrøðr journeyed to the court of Ingi Haraldsson, King of Norway in 1152, where Guðrøðr rendered homage to the Norwegian king, and seemingly secured recognition of the royal inheritance of the Isles.