This is interesting (from Billboard):
Amidst ephemera of all sorts stored in a room behind his recording studio, Johnny Cash kept hundreds of tapes. Within that trove was a set marked "Personal File," which turned out to be a pot of gold.
These solo recordings, made mostly in the 1970s, find the country music icon performing everything from what producer Greg Geller describes as "late-19th century parlour ballads to mid-20th century country hits ... songs inspired by recent events and experiences ... songs of faith and inspiration."
Fans will get a taste of the revelatory material with the May 23 release of "Personal File." The two-disc Columbia/Legacy set boasts 49 cuts, many of which include reflections by Cash that serve as introductions.
Among the highlights are such songs as "My Mother Was a Lady," "The Way Worn Traveler," "What Is Man," "Louisiana Man," "Saginaw, Michigan" and a rendition of the Irish traditional "Galway Bay."
Here comes the Notorious C.A.S.H.!