The Devil's Beef Tub

Here at the head of Annandale in Dumfriesshire and where the River Annan rises, is the natural glacial feature known as the Devil's Beef Tub. Close to here is the farm of Corehead where Tom Halliday met his uncle, William Wallace. Together with a small band of followers they captured Lochmaben Castle from the English. This incident is recorded by "Blind Harry" about 1477 in the famous poem written in Scots, "The Wallace". The deeds of Tom Halliday and his famous uncle took place about 1296 and thus Tom Halliday is the earliest recorded Halliday in Scotland. "The Wallace" contains many historical errors and records events which never happened. Was Tom Halliday a real person or a fictitious character in "Harry's " composition?