Eagle-eyed, web-savvy fans of Peter, Paul and Mary have helped return a guitar stolen four years ago to the folk group's Peter Yarrow.
In December 2000, Yarrow's handmade Canadian Larriv�e acoustic guitar -- made in 1973 and stored in a case bearing his name -- disappeared during a flight from Washington to Fort Lauderdale, Fla. The $500 US reward for its recovery went unclaimed.