I recently inherited a piece of land that is being used by a local farmer. He has used it for years and years, and has paid rent in return. The only problem is he has been using it under a gentleman's agreement and no written agreement exists. He does not want to enter into a written agreement and wants to keep it all informal. I have no idea why this is, but I do not want to leave anything to chance. I don't want him to leave the land and don't see myself ever selling it. It is in the greenbelt and I prefer grass to houses. But is there a way I can force him to enter into a written agreement?