I've done quite a bit of work on this family, so am just looking for info on first of 9 kids George, as well as when father William arrived Australia.
William was born in Aberdeen (prob Old Deer) in 1851, 2d to last of 11 kids of John Mitchell and Ann Smith Manson, and the only one who roamed far from home.
His and Mary's first child was George Mitchell, b. 1877, a chemist in 1919 with possible spouse named Dorothy May (from electoral Registers); had dau b 1895, as found in online newspaper.
They seem to have lived in Footscray, and although I can find info on marriages and deaths of each of his siblings, I cannot find the same info for him. He is mentioned as deceased (not surprising) in the obits of two sibs who died in the early 1970s.
In the 1895 census George is referred to as 'a chemist' (he would have been 17 or 18, so married quite young apparently). Because of this info, there is some possibility the 1895 birth and early 1900s electoral listings are to a completely different Geo. Mitchell.
This isn't hugely important, and I have spent a fair amount of time on it, but I thought I would offer it up for consideration of knowledgeable Australian researchers.
Nick