I am trying to understand my family roots. My mother is Hypathia Joan Salmon she is the daughter of Christopher John Salmon B 12 Mar 1893 and son of Annie Agnes Wilson and Christopher Salmon

I have a lot of information on Grandmother Meikle's side but cannot find a lot of information on Christopher John Salmon other then the following:
His father Christopher Salmon married Annie Agnes Wilson 14 Mar 1872
The following children were born
Mary Ann Salmon 20 Feb 1878;
Margaret Salmon 23 Jul 1880 D 25 Nov 1899;
Rose Mary Salmon 1 Oct 1885 Married a (Thomas) Norman Richard Leighton in dec 1912 and had 3 children;
Thomas Wilson Salmon 21 Jan 1890;
William Christopher Salmon 2 Jun 1891;
Christopher John Salmon 12 Mar 1893 (My Grandfather);
Theresa Mary Salmon 7 Oct 1895;
Herbert Lyell (Lionel) Salmon 7 May 1898 D 25 Jul 1898;


If anyone knows of when Christopher was born, who is parents were or when he may have come to Australia and the same goes with his wife