Hi again,
I think the Cowie family were on the ship: PETERBOROUGH, arriving Sydney 4th May 1879.

Thomas 48 and Christine 45 are the parents travelling with quite a few children, including Elizabeth Cowie, aged 22 born 1857. They came from Stirling area. Some other children were Robert 19, John 16, William 14, Ellen 13, Christine 10, Margaret 5, Thomas 2.

Brian, Glasgow