Thanks, Bob. The collection of bush songs in Paterson's book has some odd selections (or so they seem to a 'foreigner'), but in some ways that makes the book even more interesting, and a good companion to Meredith and Anderson.
Would it be possible to dig up the article on the performance in 1843? Might name names.
A shortened version is in the National Library of Australia website, called "Billy Barlow's Emigration to Australia." Date bet. 1850-1859, sung by Toole. The usurer is named as Tom Latitat and there are other slight differences, but the two versions definitely originated from the same pen.

I have a lawyer son but I haven't had a chance to ask him about the terms. Thanks for Fi. fa.