I wonder if he confused raids on Scotland by Manx (certainly I can'y find any other refernce to sucha raid in that year) - see www.manxnotebook.com/jmmuseum/d012.htm for a couple of manx mac's raiding Galloway in 1513 so possibly the Bride folk were justified in expecting a return match on home ground - Nigel has summarised the Anglo Scots wars well - the Earl Edward was heavily involved in the peace settlement of 1550 see www.manxnotebook.com/people/lords/edward.htm