William died at the Battle of Flodden September 9, 1513 in Northumberland, England. He d.s.p.m. and v.p.[2]
Sources
↑Paul, James Balfour. "The Scots Peerage : founded on Wood's ed. of Sir Robert Douglas's Peerage of Scotland; containing an historical and genealogical account of the nobility of that kingdom", Edinburgh: David Douglas, 1904, Vol. I, Archive.org,
p. 460
↑ 2.02.12.22.32.42.52.62.7Paul, James Balfour. "The Scots Peerage : founded on Wood's ed. of Sir Robert Douglas's Peerage of Scotland; containing an historical and genealogical account of the nobility of that kingdom", Edinburgh: David Douglas, 1904, Vol. I, Archive.org,
p. 461