New Cumnock known as Castle William, for upon this sted Sir William Wallace held a ryall house, a crown property. On 10 February 1306, Robert the Bruce killed John Comyn at Greyfriars Kirk, Dumfries. By May of that year Bruce was crowned King of Scots at Scone but early setbacks against English forces saw him seek refuge in the Western Isles and then in Ireland. In the spring of 1307 Bruce and his followers returned to the Scottish mainland and ambushed an English force under the command of Sir Aymer de Vallence at Glen Trool, Galloway. Worse was to follow for the
Christopher Seton letter of excommunication was issued naming the Earl of Carrick and three other knights, Sir Alexander Lindsay, Sir Christopher and his brother John Seton as John Comyn's murderers. Seton was also present at the coronation of his brother in-law King Robert I, King of Scots, at Scone on 25–26 March 1306. Some accounts have him present at the Battle of Methven on 19 June 1306 but Duncan places him at Loch Doon Castle, an important castle for the Earls of Carrick and one of three that Robert tried to hang on to, but Loch Doon fell about 14 August. Loch