 Nominal Norwegian authority had been re-established after Somerled's death, but by the mid 13th century, increased tension between Norway and Scotland led to a series of battles, culminating in the Battle of Largs, shortly after which the Norwegian king died.In 1266, his more peaceable successor ceded his nominal authority over Suðreyjar to the Scottish king (Alexander III) by the Treaty of Perth, in return for a very large sum of money.Alexander generally acknowledged the semi-independent authority of Somerled's heirs; the former Suðreyjar had become a Scottish crown dependency, rather than part of Scotland.