Correction and more info. I should have said bride*groom* of course.
Montrose was in exile in the Low countries when he heard of the execution of Charles 1. He swore to avenge his death and landed at Caithness in the spring of 1650 with a small army. He recieved little support from the clans and after a very short campaign was routed at the battle of Invercharron. He fled into Sutherland where after nearly starving to death he was betrayed by MacLeod of Assynt. He was hanged at the Grassmarket in Edinburgh after a brief trial. (Source: Blackies comprehensive history of England) Just goes to show how unreliable folk song is as a source of history, Haughs of Cromdale is a great song though.