The David Bowie estate is going back toward the beginning of the late singer’s career, focusing on his early days as a blues interpreter with a famous British producer. The Shel Talmy Recordings, to be released September 18, collects 21 recordings the then-unknown musician recorded with producer Talmy during 1965, when he was a member of bands The Manish Boys and The Lower Third. Only four of these tracks were released at the time as singles, with another seven alternate and outtake versions turning up on compilations over the years; that of…