On this excellent release from the World Music Network's ever-reliable Rough Guide series, a host of unknown early blues artists get their due. While Robert Johnson, Son House, and a handful of other greats from the 1920s and '30s have become widely recognized icons of the pre-war blues era, so many lesser-known, though no less talented, players have slipped through the cracks. Opening with Henry Thomas' spirited "Fishing Blues" (complete with a pan flute solo), The Rough Guide to Unsung Heroes of Country Blues winds its way through a series of wonderful and obscure country-blues gems.