Are you still looking? I have recently obtained a family tree dating back to the 1700's from my Mom's cousin. Through this message board, I have also had contact with the South African clan. He sent me their family tree, which included the Aust. clan. The 2 brothers that immigrated, were brothers to my ggg grandfather.
I'm on my Mom's computer, so this is showing up under her name. I am Cathy Grain, and my Grandfather James Alexander took over the family homestead here in Manitoba Canada. I think the ones that immigrated to South Africa and Aust.were thinking, because I can't imagine spending the winters here 100 years ago!