"The Wallaby Brigade" is to the tune of "Tramp Tramp! Tramp!" - subtitled "The Prisoner's Hope."

There's a song by (American) Ed Clifford called "Billy Barlow" but I can't read music, and I've never heard it sung, so i don't know how it compares to the Australian "Billy Barlow" (by Bnjamin Griffin???). The structure of the words reads as fairly similar.

There is a lovely Autralian song to Foster's "Gentle Annie," using the same title. I think the Australian version comes form somewhere down in Victoria, but I wouldn't hold that against it.