 Raghnall mac Gofraidh was granted Caithness after assisting the Scots king in a conflict with Harald Maddadson, an earl of Orkney in the early 13th century.This joint earldom ceased after 1375 and the Pentland Firth became the border between Scotland and Norway.No Norse place names have been found on the northern Scottish mainland south of Beauly and so far no archaeological evidence of Norse activity has been found in the north-west mainland.