Many people think this is the “Theme from The Exorcist.” However, the album was recorded and released before the music for the film was even picked. The Director was in the offices of Virgin Records, looking for music for the film. He saw this amazing album cover and played what was inside. The rest is history.
The very interesting story about the making of Tubular Bells is at https://www.youtube.com/watch?v=UQLDGpcgNTM
The sheet music can be found at https://musescore.com/user/5536576/scores/4774036
Here are the final versions. At least for now….