A farmer friend of Bill's gives him oral permission to fish in a pond located on his farm. Bill fishes in the pond for several years. The farmer sells the farm. The new owner sees Bill fishing and asks him to leave. The new owner tells Bill that he cannot fish in the pond. Does Bill have some legal right to continue fishing in the pond? If Bill does try to fish in the pond, can the new owner sue him for trespass? Explain your answers.