Good man, Wolfgang! Mention of Edwards sent me to his "The Overlander Songbook", (1971) which I had missed on a first search about the song. He gives a version, with the following notes:

"I collected this from Mrs. M. Webb of Cairns who was born in 1893 and learnt it as a young girl in the Tilba Tilba area of southern New South Wales. While on a visit to Brisbane she also sang it to John Manifold, and it will be found in his Penguin songbook.

She had learned it from her father and recalls that in his version the song concluded with the convict finally arriving on the Victorian goldfields and being killed in a miners uprising which she thinks may have been the Eureka stockade. Indeed a unique item if anyone ever manages to collect it!

Unfortunately, Mrs. Webb remembers only the tune and the first verse of this song in their entirety and so for the remaining verses I have drawn on a version collected by the late W. Percy Merrick sometime before 1912. His version also uses the same tune as that given here. This ws published in his 'Folksongs from Sussex", 1912, and titeld The Isle of France

It will be noted that there is some confusion about the term "Shamrock Green" which referes to the convict's country of origin in the first verse., but becomes the name of the wrecked boat later in the song. Perhaps the fourth line was originally "And his vessel was the SHamrock Green". This would be more logical. "

I reckon he's right about the name.

Regards p.s. The page reference matches - so this is surely the Edwards book McColl refers to (or was that you?)