Just found death of son of Geo & Catherine - he must be the infant arriving with them aboard 'Theodore' in Dec 1852:
Surname: GRAHAM Given Names: David Stewart Event: D Father: Graham Geo Mother: Cath STEWART Age: 45 Death Place: Tgulla Year: 1898 Reg. Number: 5089
Most of the family are buried at Tarnagulla Cemetery. See home.vicnet.net.au/~tarnagul/records/cemetery.html
There appears to be another son: John Stewart GRAHAM (b. Tarnagulla) married Eliza Ann SYMONS in 1884 (reg 2256). Eliza died 1940 aged 82 in Dunolly. John died in 1936 in Tarnagulla aged 81 (father as George, mother as wife's name; born c1855).
Chn, all born Tarnagulla: George Stephen b. 1884/21051, d. 1957 Dunolly aged 72 Mary Ellen b. 1886/6711, d. ? Wm Angus b. 1887/24380, d. 1966 Dunolly aged 79 Catherine Stewart b. 1893/17398, d. 1977 Bendigo aged 84 Jno Stewart b. 1895/16387, d. 1979 Dunolly aged 84 David d. 1962 Dunolly aged 70 Herbert d. 1976 H'berg aged 79