Hi Bob,

I haven't seen the sheet music but Karl Koenig and Dorian Henry both have.

Koenig copied the sheet music over in his own handwriting and you can see that if you search down on the keyword "Enrique" here:
http://basinstreet.com/wp-content/uploads/2016/09/1916.pdf

Henry put the melody up on youtube and you can see part of the original sheet music in that youtube image:
https://www.youtube.com/watch?v=mg61ZAJ0ojg

Incidentally, the fact that Dr. Koenig is about 60 years older than Mr. Henry illustrates that it's fun and chaotic to be part of a worldwide research semi-community.