 Louise viewed marriage to any prince as undesirable , and announced that she wished to marry John Campbell , Marquess of Lorne , heir to the Dukedom of Argyll . No such marriage , between a daughter of a Sovereign and a British subject , had been given official recognition since 1515 , when Charles Brandon , the first Duke of Suffolk , married Mary Tudor . Louise 's brother , the Prince of Wales , was strongly opposed to a marriage with a non @-@ mediatized noble . Furthermore , Lorne 's father , George Campbell , the eighth Duke of Argyll , was an ardent supporter of William Ewart Gladstone , and the Prince of Wales was worried that he would drag the royal family into political disputes . Nevertheless , the opposition was crushed by the Queen , who wrote to the Prince of Wales in 1869 : 
