"Bridge over Troubled Water" was composed by Paul Simon very quickly, so much so that he asked himself: "Where did that come from? It doesn't seem like me." The title concept was inspired by Claude Jeter's line "I'll be your bridge over deep water if you trust in my name," which Jeter sang with his group, the Swan Silvertones, in the 1958 song "Mary Don't You Weep." According to gospel producer and historian Anthony Heilbut, Simon acknowledged his debt to Jeter in person, and handed Jeter a check. Simon named Johann Sebastian Bach's "O Sacred Head, Now Wounded" as a source of inspiration for parts of the melody. Simon wrote the song initially on guitar but transposed it to the piano to better reflect the gospel influence and suit Garfunkel's voice.