PS-Norah was born 1807 & went with her sister to Sydney in 1830."
Thanks for the email, Joanne. I've seen several Norahs in my travels, but I don't immediately recall any married to a William Dixon. I'll add your inquiry to "Other Armstrongs of Australia". http://familyhistorymoments.weebly.com/other-armstrongs-of-australia.html
If anyone has info. for Joanne, please contact me & I'll forward it on to her.