Actually Bobby sands wrote it as a poem called "The Voyage," with no mention of the chorus "I wish I was back home in Derry. Christie Moore added the chorus/refrain when it he put it to music. The poem is bit longer than the song. It is available in the book "Writings from Prison" by Bobby Sands (1997) available through Roberts Rinehart press. Proceeds go to the Booby Sands Trust

Tiocfaidh ar la

Rick