Mike, thanks for adding you info on the song.   I've checked Wikipedia, and though I had previously learned, from a sheet music book, that the original song dated way back before 1940, and though some of your comments are there now at Wiki, the Wiki page is confusing and still sort of makes it sound like the song was composed about 1940.
The page probably needs a bit more editing to make the song's history follow chronologically and be make it clear when the original song was composed and by whom.

Genie.