On a less speculative note, MIke Scott (The Singer/Songwriter/Guitarist/Pianist of the Waterboys) has said that the song's subject is "a composite of many people", including C.S. Lewis.
On a less speculative note, MIke Scott (The Singer/Songwriter/Guitarist/Pianist of the Waterboys) has said that the song's subject is "a composite of many people", including C.S. Lewis.