A tough old knight in his late fifties, Tweng was a veteran of the wars against the Scots, and was distantly related to Bruce. He showed great courage when the English were defeated at Stirling Bridge in 1297, forcing his way through the Scottish ranks to safety.
He knew the area around Stirling well, having previously been commander of the castle.
It is his actions at the end of the battle which have added to Marmaduke Tweng’s colourful story. Recognising the danger in trying to escape across the muddy and fast-flowing Bannock Burn, he is said to have hidden in a bush after the battle was lost and then handed himself over as a prisoner to Robert Bruce himself.
Bruce showed his respect for his experienced kinsman by entertaining him and treating him courteously, before sending him home to Yorkshire without having to pay a ransom.