I have obtained a the original sheet music but unfortunately it doesn't match either of the YT videos attached below. That's quite frustrating since I've had so many hits and requests for the chords to this song on the blog and thought I had this one settled. But it appears that there are several versions. The top video has changed the lyrics and created a male/female duet and the bottom video just uses a portion of the song.
Here's another variation. This YT video has some historical info.