Jay Unger, who wrote the tune that became the them of a PBS documentary on the US Civil War, often refers to that tune as “a Scottish lament written by a Jewish guy from the Bronx”. There is a good interview with him here.
The haunting lyrical tune was actually named for an annual fiddle camp held in Ashoka in the Catskills in the USA.  There is of course a ready connection with Canberra Australia, in that Ashoka also  has an artificial lake which submerged part of the old town. So it could be read as a farewell to the old town, and a bitter-sweet thought that the old town might one day re-emerge from the depths.

 You can hear me playing a version of that tune here.