The Fagans - James Fagan (vocals, bouzouki), Kate Fagan (guitar, vocals), Margaret Fagan (vocals) & Bob Fagan (guitar, vocals) - performing live at Humph Hall, Sydney, Australia in March 2011. It's a song written by John Schuman, who also wrote the song "The Diamantina Drover" which was covered by many Folk artists, such as Patrick Street. John Schuman recorded the song with his group Redgum.
Here' s a live version from Redgum recorded in 1984
And here's an acoustic version of "The Diamantina Drover" from Redgum. Unfortunately I can't find the original studio recording.