The Tree to David Cassidy in 13 Steps
- The Tree is heard in Skidoo
- Skidoo starred Carol Channing
- Carol Channing was born on January 31
- January 31 is the birthday of Christian Nesmith
- Christian Nesmith is a child of Michael Nesmith
- Michael Nesmith played guitar for The Door into Summer
- The Door into Summer was written by Bill Martin
- Bill Martin played guitar for Blackbird
- Blackbird was written by John Lennon
- John Lennon wrote She's Leaving Home
- She's Leaving Home was written by Paul McCartney
- Paul McCartney produced Mary Hopkin's recording of The Puppy Song
- The Puppy Song was covered by David Cassidy