Hi Penny,
Thank you for putting this post on here, I had no idea the family came out to Australia. I'd love to swap information with you.
I've done a lot of research on the family & have a lot of certificates. Donald MacDonald (Alexander's father) was one of my great, great, grandfather Allan's brothers. He to came to Australia but settled in Victoria we think he arrived in the mid 1850's. You have a lot of MacDonald cousins her in Australia including me
A cousin of Allan & Donald settled in South Australia, that's another story.
I'll send you a personal message & you can use my email address.
I look forward to hearing from you.
Dee (Ballarat, VIC)