David T. Walker to Mary Hopkin in 6 Steps
- David T. Walker played guitar for Bongo Rock '73
- Bongo Rock '73 was mixed by John Lennon
- John Lennon wrote Blackbird
- Blackbird was written by Paul McCartney
- Paul McCartney produced Mary Hopkin's recording of The Puppy Song
- The Puppy Song by Mary Hopkin features guitar played by Mary Hopkin