Her unhappy death renewed the contest between Bruce and Balliol, and when it was proposed that the King of England should arbitrate, Menteith was one of those named by Bruce as his commissioners. He was present at Norham on 20 November 1292 when the new king John Balliol swore fealty to Edward I of England. This is the last certain record of him, as although letters were addressed by the English King to Walter Stewart, Earl of Menteith, on 29 June 1294, it is not clear that he was then alive. He may even have been dead by 10 February 1293, when Balliol's Parliament directed the lands of Knapdale belonging to the earl to be incorporated in the sheriffdom of Lorn under Alexander of Argyll.