 He was then sent to Macdonald of Clanranald, in South Uist, and tied up into a sack and cast into the sea.Another of Ùisdean's sons, Aonghas Dubh was also made prisoner by Macdonald of Clanranald, and was long held captive.One day he was permitted to run on the Strand of Askernish in South Uist, to see if he could run as well as he could prior to his incarceration.