E. Cobham Brewer 18101897. Dictionary of Phrase and Fable. 1898.
The vassal of Philip of Mortham. Oswald Wycliffe induced him to shoot his lord at Marston Moor, and for this vile deed the vassal demanded of him all the gold and movables of his late master. Oswald, being a villain, tried to outwit Bertram, and even murder him; but in the end it turns out that Mortham was not killed, neither was Oswald his heir, for Redmond ONeale, the page of Rokeby, is found to be Morthams son. (Scott: Rokeby.)