Samuel Cobb; The Paul Brock Band.In this week’s “From the Vault” segment, we revisit legendary educator, country music legacy, and the original keeper of the vault, Mark Jones, offering a 1979 archival recording of David Prine, the brother of John Prine, performing the song “Southern Railroad Blues” from the Ozark Folk Center State Park archives.In his segment “Back in the Hills,” writer, professor and historian Dr. Brooks Blevins explores the history of bears in the Ozarks.