"Think of Rain" is an unreleased song recorded during the Aerial Ballet sessions.
We learned from someone at RCA who was compiling a Nilsson package that "Think of Rain" was listed on a tape box, but razor-cut out. (Harry apparently did that when he didn’t like a performance.) Harry told me that he had tried recording the song many different ways - fast, slow, hard, soft - but nothing worked. He said he’d let me hear it, but never did. So it was never released, I never heard it, and the public will never hear it. Alas!
-- Margo Guryan (2012) 
-  "Margo Guryan :: The AD Interview" Aquarium Drunkard (2012-09-27) (https:/
/) aquariumdrunkard. com/ 2012/ 09/ 27/ margo- guryan- the- ad- interview/