This 10-minute epic is a Victorian fairy tale about two small children in a country house. The song touches on themes of death, reincarnation and lust, and is based on a 1969 demo by Anthony Phillips and Mike Rutherford
called "F Sharp." Phillips has never received credit for his part in writing the song. It became one of Genesis' signature tunes from their progressive rock-era and was a staple of their live performances for many years.