 However Douglas had Patrick murdered when presented with the royal warrant, whilst he entertained his uncle's son, his cousin, at dinner.There is a tradition that in revenge, the MacLellans used the celebrated Scottish cannon Mons Meg to batter down Threave Castle, of which there is little doubt.During the Anglo-Scottish Wars Sir William Maclellan of Bombie was knighted by King James IV of Scotland but was killed at the Battle of Flodden in 1513 fighting for the king.