Clan Sinclair to St Briavels Castle, and in 1296 he swore fealty to Edward I of England. In 1303 the Battle of Roslin took place where Scots under Henry Sinclair of Rosslyn and the Clan Comyn defeated an English force. The Battle of Loudoun Hill took place in 1307 where Scots under Robert the Bruce, assisted by Henry Sinclair of Rosslyn again defeated the English. The family initially favoured John Balliol's claim to the throne but later it became paramount that they gave their loyalty to Robert the Bruce. The Battle of Bannockburn was fought in 1314, where the Clan Sinclair fought
Robert the Bruce years. A team of researchers, headed by Professor Andrew Nelson from University of Western Ontario have determined that Robert the Bruce did not have leprosy. They examined the original casting of the skull belonging to Robert the Bruce's descendant Lord Andrew Douglas Alexander Thomas Bruce, and a foot bone that had not been re-interred. They determined that skull and foot bone showed no signs of leprosy, such as an eroded nasal spine and a pencilling of the foot bone. The king's body was embalmed, and his sternum sawn open to allow extraction of the heart, which Sir James Douglas placed