king was stricken with a "great sickness" in 1163, and it is possible that he never fully recovered. The fact that the Annals of Ulster accords Malcolm the epithet "Cennmor" ("Big Head") upon his death could be evidence that he suffered from Paget's disease. One possibility is that the king's impairment was opportunistically seized upon by Somairle, who overestimated a weakening in Scottish royal power. Aftermath Although it is conceivable that Dubgall was able to secure power following his father's demise, it is evident from the Chronicle of Mann that the kingship of Mann was soon seized by Guðrøðr's brother, Rǫgnvaldr. Before the end of the year, Guðrøðr is said by the same source to have arrived in the Isles, and ruthlessly overpowered his brother. Guðrøðr thereafter regained the kingship, and the realm was divided between him and Clann Somairle, in a partitioning that stemmed from Somairle's coup in 1156. Although there is no direct evidence that Somairle's imperium fragmented upon his death, there is reason to suspect that it was indeed divided between his sons. In the decades that followed Somairle's demise, there is evidence to suggest that the known inter-dynastic infighting amongst his descendants was capitalised upon by Walter and his family. Queen Blearie's Stone There are several local traditions concerning the location of the battle. One account, dating to the late eighteenth century, asserts that the invaders landed at Renfrew, and that they marched southwards to Knock, an elevated land form situated between Renfrew and Glasgow, where they were defeated by local forces. In 1772, Thomas Pennant visited this site, and observed "a mount or tumulus, with a foss round the base, and a single stone on the top", which he was led to believe marked the spot where Somairle was defeated. Earlier accounts of the monument accorded it forms of the name "Queen Blearie's Stone", and associated it with accounts linking it to the death of Marjorie Bruce, and the caesarean birth of her son, Robert II, King of Scotland. Pennant's account may have been influenced by David Dalrymple, who suggested that this name may mask a Gaelic toponym—which he gave as Cuiné Blair ("Memorial of Battle")—a name that actually referred to the Battle of Renfrew. If the monument was indeed associated with the battle, it could be identical to the pillar pictured upon Walter's seal. If so, the seal's depiction of a man leaning against