Glen Sherley

Glen Milborn Sherley was an American who became a country singer-songwriter after his song "Greystone Chapel" was made famous by Johnny Cash in 1968. Sherley wrote the song while in prison and it was later performed by Cash at his Folsom Prison performance, which was eventually released as the album At Folsom Prison. Sherley was in the front row, unaware that his song was going to be performed.