Hi,
There are the following christenings in Great Bedwyn that may be helpful:-
19/1/1831 George and James Newman (twins) sons of Richard and Ann, carpenter, East Grafton.
19/1/1833 Elizabeth Newman d/o Richard and Ann, carpenter, East Grafton.
This is probably the parents marriage:-
28/12/1830 Richard Newman bachelor of this parish and Ann Jackman spinster of this parish. Also in Great Bedwyn.
I have looked for a marriage for Elizabeth Newman and Thomas Jones and have only found one in Liverpool for Thomas Abraham Jones and Elizabeth Newman Jun.1855 vol.8b page.74
Perhaps they sailed from Liverpool to Australia and got married first ??
PtE