Robert Johnson is well-known as a seminal bluesman now, but the musician, who lived from 1911 to 1938, was just another forgotten master until Columbia Records reissued a compilation of his work in 1990. The album was certified Gold, unheard of for a reissue at the time. It also fueled the fire of Columbia exec Josh Rosenthal, who would go on to leave the major label world and start Tompkins Square Records, which for more than a decade has focused on finding unheralded masterpieces from the past and making them available to today’s audiences. Rosenthal, 48, is based in San [...]