1282 Roger de Clifford died on November 6. "He was drowned when crossing a bridge of boats near the Menai Straits." [1] (The Menai Strait is a narrow stretch of shallow tidal water about 25 km long, which separates the island of Anglesey from the mainland of Wales.)
[1] George E. Cokayne, Vicary Gibbs, ed., The Complete Peerage of England Scotland Ireland Great Britain, Vol. 3, Canonteign to Cutts (London, St. Catherine Press, 1913), 290, [InternetArchive].