Checking 1901 census for Co. Leitrim (
www.leitrim-roscommon.com) there's one possiility for Owen Mitchel, wife and children in Cloone:
Owen Mitchell (40) shopkeeper, Margaret Mitchell (40), Anna Maria Mitchell (17), Sarah Kate Mitchell (14), William Charles Mitchell (12), Ellen Mitchell (9), Margaret Luisa? Mitchell (7).
There is also an Anne Mitchell (widow) with Charles, Bridget and Rose.
Owen (born c1861) was born before civil registration of births in Ireland (1864) but this
might be his parents and some siblings-
Owen Mitchell m. Anne Conlon:
1. Anne Mitchell born 27 Sept.1864 Mohill dist.
2. Charles Mitchell born 24 July 1866 Mohill dist.
3. Rose Mitchell born 12 Oct.1869 Mohill dist.
4. Catherine Mitchell born 8 Dec.1871 Co. Leitrim
5. Ellen Mitchell born 10 July 1874 Mohill dist.
If Owen Mitchell died in Australia are there any details on his death certificate like parents' names that might help?