Hi,
Your best bet would be to follow them through on QLD BDM (just google)
They had a few children, one with middle name Thomsett so must be a connection somewhere.
They married
1859/C163 Blight Rosina/Gunnourie John
but use * as a wildcard as the surname is often mispelt/transcribed. (gun* or gunn*)
TROVE might also have some clues.
Kellie