"Who is that?" Frodo asked, when he got a chance to whisper to Mr Butterbur. "I don't think you introduced him?"
"Him?" said the landlord in an answering whisper, cocking an eye without turning his head."I don't rightly know. He is one of the wandering folk - Rangers we call them. He seldom talks: not but what he can tell a rare tale when he has the mind. He disappears for a month, or a year, and then he pops up again. He was in and out pretty often last spring; but I haven't seen him about lately. What his right name is I've never heard: but he's known round here as the Doctor."