Young Richard lived in comparative retirement with his mother for about six years after his return to England. His father's sickness continued. Indeed, the prince was so feeble in body, and so dejected and desponding in mind, that he was well-nigh incapable of taking any part in public affairs. His brother, John of Gaunt, Duke of Lancaster, remained for some time in Aquitaine, and was engaged in continual wars with France, but at length he too returned to England. He was a man of great energy of character and of great ambition, and he began to revolve the question in his mind whether, in case his brother, the Prince of Wales, should die, the inheritance of the kingdom of England should fall to him, or to Richard, the son of his brother. "My brother Edward is older than I," he said to himself, "and if he should live till after our father the king dies, then I grant that he should succeed to the throne. But if he dies before the king, then it is better that I should succeed to the throne, for his son Richard is but a child, and is wholly unfit to reign. Besides, if the oldest son of a king is dead, it is more reasonable that the next oldest should succeed him, rather than that the crown should go down to the children of the one who has died." The laws of succession were not absolutely settled in those days, so that, in doubtful cases, it was not uncommon for the king himself, or the Parliament, or the king and Parliament together, to select from among different claimants, during the life-time of the king, the one whom they wished to succeed to the crown. All were agreed, however, in this case--the king, the Parliament, and the people of the country--that if Edward should survive his father, he was the rightful heir. He was a universal favorite, and people had been long anticipating a period of great prosperity and glory for the kingdom of England when he should be king.