Prologue is an album by Elton John, featuring recordings made in the 1960s. It features four songs with Linda Peters on vocals (who then went on to marry musician Richard Thompson). Elton sings the remaining titles. The CD is a copy of an original vinyl demo album recorded on white label and released in 1970 to publicise the then fledgling Warlock label owned and run by producer Joe Boyd. It seems only 100 of these original vinyl albums were made. Six are known to exist. Elton owns one and the other five are in private hands. The CD is a copy of a rather scratched original and its sound quality is pretty bad. Stylistically, it is very similar to Tumbleweed Connection. The songs are all written by artists signed to Warlock, including Nick Drake and John Martyn.