From 1970 to 1979, Rolling Stone reviewed thousands of albums, including hundreds of blues (and blues-rock) records, a few of which technically came out in the Sixties. Some of the best of them — from artists ranging from the traveling companion of Robert Johnson to a not-yet-famous Edgar Winter — vanished into obscurity. These are 10 blues albums we loved then that still sound great today, even though most people have never heard them; if these records never found the audiences they deserved, well, that just gave their creators one more reason to sing the blues.