What does Robert have difficulty understanding about the changes in his home in the novel, Wild Robert?

Robert reacts to the presence at his home of tourists and staff members by using magic in ugly and thoughtless ways, as a small boy would do. He cannot grasp the changes that have taken place since he was "put down" for witchcraft centuries ago. He cannot accept Heather's explanations of the custodial role her parents hold at Castlemaine as employees of the British Trust. Robert's responses address the theme of inevitable change and the need for individuals to adjust.