A Child's History of England by Charles Dickens

Roger Mortimer, the Queen's lover (who escaped to France in the last chapter), was far from profiting by the examples he had had of the fate of favourites. Having, through the Queen's influence, come into possession of the estates of the two Despensers, he became extremely proud and ambitious, and sought to be the real ruler of England. The young King, who was crowned at fourteen years of age with all the usual solemnities, resolved not to bear this, and soon pursued Mortimer to his ruin.

The people themselves were not fond of Mortimer-first, because he was a Royal favourite; secondly, because he was supposed to have helped to make a peace with Scotland which now took place, and in virtue of which the young King's sister Joan, only seven years old, was promised in marriage to David, the son and heir of Robert Bruce, who was only five years old. The nobles hated Mortimer because of his pride, riches, and power. They went so far as to take up arms against him; but were obliged to submit. The Earl of Kent, one of those who did so, but who afterwards went over to Mortimer and the Queen, was made an example of in the following cruel manner: