The lovely Australian was Sorrel Wilby, who is a celebrity in her country now. I read her book Journey Across Tibet a year or two after I returned to the US. I seem to remember that she wrote that she saw no other Westerners on her entire journey. If I am remembering correctly, this was a tiny bit of a fib (and maybe fair enough, considering the brevity of our encounter). I am sure the Wombat story is perfectly factual, though.
Back to the Tibet travelogue.