The Earl of Gaunt's famous duel with the Count de la Marche, of the Grey Musqueteers, was attributed by common report to the pretensions of that officer (who had been a page, and remained a favourite of the Queen) to the hand of the beautiful Lady Mary Caerlyon. 
The Earl of Gaunt's famous duel with the Count de la Marche was because of that officer's pretensions to the hand of Lady Mary. 