Humphrey de Bohun, 4th Earl of Hereford all the refugees who entered the castle were taken prisoner by its formerly pro-English governor Walter fitz Gilbert who, like many Lowland knights, declared for Bruce as soon as word came of the Scottish King's victory. Humphrey de Bohun was ransomed by Edward II, his brother-in-law, on the pleading of his wife Isabella. This was one of the most interesting ransoms in English history. The Earl was traded for Bruce's queen, Elizabeth de Burgh and daughter, Marjorie Bruce, two bishops amongst other important Scots captives in England. Isabella MacDuff, Countess of Buchan, who had crowned Robert Bruce in 1306 and
King of the Romans Papal approval, taking the title as soon as they were crowned in Germany or upon the death of a sitting Emperor if they were elected as heir to the throne. The following were ruling Germanic Kings of the Romans, i.e. men who ruled the Kingdom without subordination to another King but who had not yet been crowned Emperor. The Holy Roman Empire was an elective monarchy. No person had a legal right to the succession simply because he was related to the current Emperor. However, the Emperor could, and often did, have a relative (usually a son) elected to succeed