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					Originally Posted by  The Saucepan Man
					 
				 
				I suspect that this may well be the answer. 'Third time pays for all' is a proverbial saying, apparently dating from the 16th century. And we know how much Hobbits love their proverbs, saws and sayings!    As I recall, Sam also refers to the phrase at some point, as one of the many that his old Gaffer used to say (perhaps that's where Bungo picked it up from).  
			
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 Ah! You're right about Sam saying it at least once.
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				'Gollum!' he called softly. 'Third time pays for all. I want some herbs.'
			
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 That after Gollum had brought him the rabbits, then water in Ithilien.