 The findings led Professor Alcock to conclude that Urquhart is most likely to have been the site of Emchath's residence, rather than that of Bridei who is more likely to have been based at Inverness, either at the site of the castle or at Craig Phadrig to the west.Some sources state that William the Lion had a royal castle at Urquhart in the 12th century, though Professor Alcock finds no evidence for this.In the 12th and 13th centuries, the Meic Uilleim (MacWilliams), descendants of Malcolm III, staged a series of rebellions against David I and his successors.