Great cover of that classic song. There's Glenn Campbell's cover, released the same year as the original. By May 1968, an estimated 50 artists had recorded covers of "Gentle on my Mind", while Campbell's recording had sold 600,000 singles. As they say, imitation is the sincerest form of flattery.
"Gentle on My Mind" is a song that was written and originally recorded by John Hartford, and released on his second studio album, Earthwords & Music (1967). Hartford composed the song after watching Doctor Zhivago in 1966, as he was inspired by the film and his own personal experiences. The lyrics describe the reminiscences of lost love of a man as he travels through the country. The following year, Hartford released the song as a single on RCA Records.
Here's the John Hartford '67 original.