Arthur, Duke of Britain, is John’s nephew, the son of his dead older brother Geoffrey.
As such, by the laws of primogeniture he has a better right to the throne than John has. Quite young, his rights are pushed forwards far more by his mother than by himself; though he plays his role, he is at best a pawn, pushed around as need be and used as an excuse by Philip. Captured by John, he is given into the keeping of Hubert, to whom he grows very attached. He is a kind-natured boy who feels keenly that all that happens to him and because of him is not his fault. He is for good reason scared of his uncle, though he still finds it hard to believe that John orders his eyes to be put out. He succeeds in pleading for his eyesight and life with Hubert, but he is still afraid and plans to escape. Disguised as a ship-boy, he attempts to escape his prison by jumping from the castle walls, but this is not successful, as he merely ends up dead.