"Sixteen Tons" became a No. 1 "Billboard" country hit for Tennessee Ernie Ford in 1955 and has been recorded many times over the years. Travis and Molly Bee appeared together as guests on November 24, 1960, on NBC's "The Ford Show, Starring Tennessee Ernie Ford". The darkly philosophical "Dark As A Dungeon", although never a hit single, became a folk standard during the 1960s folk revival, and has been covered by many artists including Johnny Cash in his best-selling concert album "At Folsom Prison", by Dolly Parton on her "9 to 5 and Odd Jobs" album and by Travis himself, along with the Nitty Gritty Dirt Band in the landmark 1972 album "Will the Circle Be Unbroken". In spite of its initial lack of commercial success, "Folk Songs of the Hills", with added tracks, has remained in print virtually ever since.