From 1977, "Solsbury Hill" was Peter Gabriel's first solo single after leaving Genesis. Wikipedia has some interesting things about the song.
Gabriel has said of the song's meaning, "It's about being prepared to lose what you have for what you might get ... It's about letting go." His former bandmate Tony Banks acknowledges that the song reflects Gabriel's decision to break ties with Genesis, but it can also be applied in a broader sense to situations of letting go in general.
The song is mostly written in 7/4 time, an unusual time signature that has been described as "giving the song a constant sense of struggle". The meter settles into 4/4 time only for the last two measures of each chorus. It is performed in the key of B major with a tempo of 102 beats per minute, with Gabriel's vocals ranging from F♯3 to G♯4.