Did you know that there are just two songs with Nick Mason credited as the only author? They are The Grand Vizier’s Garden Party and Speak To Me, which was only credited to him because of the royalties. Did you know that the song Mihalis on one of David Gilmour’s solo albums is named after a boat bought by David in Greece? Mihalis is Greek for Michael. Did you know that Empty Spaces contain a secret message audible only when played backwards?