Mick,As I mentioned in our chat I found the song and will be snailmailing the printout to you asap. In the meantime, here is some info and the site at which I found it using the search function...the direct link is a mile long so I won't include that.
The site is from Duke University and has vintage stuff like Lester Levy's site (for anyone else who may be reading this)...
Mary
Title: When I leave the world behind
First Line: I know a millionaire who's burdened down with care
Refrain: I'll leave the sunshine to the flowers
Publication Date: 1915
Composer: Berlin, Irving
Performer: Al Jolson
Artist: Strauss Peyton; Barbelle, Albert W., 1888-1957
Dedicatee: Charles Lounsbury
URL: Historic American Sheet Music
http://scriptorium.lib.duke.edu/sheetmusic/