From Voices Offstage, by Marc Connelly:

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The picture [a serial] was called The Great Secret.... I never found out what the great secret was and I don't think anyone else working on the picture knew either.

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[a Retroactive Lifetime Goal?]

...Jack Donohue, a droll comedian regarded by Ray Bolger as America's greatest eccentric dancer....

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[Bonus: I recently reread a Benchley piece about informal group singing at parties, in which he notes that "Kiss Me Again" is a favorite because you can pretty much get through it by singing those three words over and over, if you're shaky on the actual lyrics. A few days later, reading this memoir by Benchley's colleague Connelly, I learned that the actual lyrics to KMA were, according to MC, mostly "dummy lyrics"--i.e., the lyricist's placeholder lyrics, which were unexpectedly used in the song's public debut performance because the lyricist had been suddenly taken ill and was temporarily unavailable to substitute "real" lyrics. The song went so smoothly, according to MC, that consequently only "two or three minor words" were altered for the official lyrics.]