Premise: Eustace Clarence Scrubb is a fictional character in C. S. Lewis's Chronicles of Narnia. He appears in "The Voyage of the Dawn Treader", "The Silver Chair", and "The Last Battle". In "The Voyage of the Dawn Treader", he is accompanied by Edmund and Lucy Pevensie, his cousins. In "The Silver Chair" and "The Last Battle", he is accompanied by Jill Pole, a classmate from his school.
Hypothesis: Eustace Clarence Scrubb is a slow boy