Lewis (and the rest of the Western Isles) became part of Scotland once more in 1266: under the Treaty of Perth it was ceded by the Kingdom of Norway. Under Scottish rule, the Lordship of the Isles emerged as the most important power in north-western Scotland by the 14th century. The Lords of the Isles were based on Islay, but controlled all of the Hebrides. They were descended from Somerled (Somhairle) Mac Gillibride, a Gall-Ghàidheil lord who had held the Hebrides and West Coast two hundred years earlier. Control of Lewis itself was initially exercised by the Macleod clan, but after years of feuding and open warfare between and even within local clans, the lands of Clan MacLeod were forfeited to the Scottish Crown in 1597 and were awarded by King James VI to a group of Lowland colonists known as the Fife adventurers in an attempt to anglicise the islands. However the adventurers were unsuccessful, and possession eventually passed to the Mackenzies of Kintail in 1609, when Coinneach, Lord MacKenzie, bought out the lowlanders.