I've checked the following in search of the original 1907(?) sheet music:

Lester S Levy collection - lists only the 1939 item, no link to it. Doubtful value, as it is the original that will be decisive.

American Memory (Lib Cong./Duke U) - has no copy.

I'm open to further research suggestions. Can anyone find the original 1907(?) sheet music?

That would show us whether there are more lyrics than appear on the 1908 Murray recording. Likely there are; writers of that era loved writing lots of verses.

Bob