Brownie McGhee had a big hit with "My Fault," an amazing electric blues/R&B song he cut in 1948. But in the '50s, the Tennessean and his longtime harmonica accompanist Sonny Terry returned to their acoustic country-blues roots, eventually hooking up with the folk scene in New York. This late-'50s session is grimy and propulsive, as best evidenced by their version of "John Henry," Terry's harmonica a chunky chug of full, rich tones, and the two men's harmonies in the chorus flat-out fantastic. The reverb-drenched "Heart in Sorrow" is the place to start as the interplay between McGhee's six strings, Terry's harp and their voices perfectly illustrates their considerable charm.