Barry Guy to Postcard in 7 Steps
- Barry Guy played bass for It Is He Who Will Be King
- It Is He Who Will Be King was arranged by Paul Buckmaster
- Paul Buckmaster arranged Perhaps This is All a Dream
- Perhaps This is All a Dream features percussion played by Ray Cooper
- Ray Cooper played percussion for Frankenstein, Merlin & The Operation
- Frankenstein, Merlin & The Operation was produced by Harry Nilsson
- Harry Nilsson produced Postcard