1911        Morrison, K.E. “For a Scout’s Honor.â€쳌 Boys’ Life 1(4) (June 1911).

A Play in Four Acts, Presented by Troop 2, Norwich, Conn., Boy Scouts of America.

In the middle of the play, the scouts are instructed to sing a specially arranged medley.

It is indicated that it should be sung to the tune of “Australiaâ€쳌. It seems like the CAPE COD GIRLS form -- closely related to what we call "South Australia":

Old Norwich City is a great old town.
(Chorus) Heave away! Heave away!
With its streets and alleys up and down.
(Chorus) Heave away! Heave away!
(All) Heave away, my bonny, bonny boys. Heave away; Heave away. Heave away, my bonnie, bonnie boys. We’re out in the country…

This suggest that "South Australia" was a popular song "in the air" by that time.

Note that what is now conceived of as a separate "Cape Cod Girls" form has its "heave away" emphasized "heave aWAY."