 At the same time the much smaller nearby island of Muck was able to " raise " 16 able men and in 1625 there were only three villages on Rùm , suggesting the population was being deliberately constrained . Substantial stone walls built to funnel deer into pens that may date from this period still exist in the western glens . During the 13th century Rùm became part of the estates of the powerful Clann <unk> for a brief period and then passed into the hands of Clanranald . 
