Hi, Sandy -
It was published in 1926, so it's not quite in public domain in the U.S. (thanks to Sonny Bono). Words by Greatrex Newman, music by Wolseley Charles, made popular by thwe inimitable Stanley Holloway. We have the lyrics in our Digital Tradition - you'll find the links up above.
You can buy sheet music here (click).

Anybody have corrections to the Digital Tradition version(s), or are they pretty good?
-Joe-