During the reign of Alexander II, King of Scotland, the Scots extended royal authority into Argyll and the Isles. In the early 1260s, about a decade after Alexander II's death, his son and royal successor, Alexander III, came of age and took steps to continue his father's westward expansion.Reid (2011); Wærdahl (2011) p. 49; Alexander; Neighbour; Oram (2002) p. 18. As with the previous reign, it was the Stewart family, this time in the person of Walter Stewart, Earl of Menteith, who spearheaded the campaign.Forte; Oram; Pedersen (2005) pp. 255–256; Cowan (1990) p. 122. Evidence of this push is preserved by the record of Clann Suibhne possessions being granted away in the early 1260s.Boardman (2006) p. 15; Forte; Oram; Pedersen (2005) pp. 255–256; Cowan (1990) p. 122; Barrow (1973) p. 373.
