Naomi,No luck so far finding Temperance Lavinia THOMAS birth but it was very early and probably not recorded
there are two marriages listed for OKE family
Charles Colwell OKE married Mary MITCHELL 0n 10.3.1851 south australia
Paul OKE married Temperance Lavinia THOMAS 8.5.1851 south australia
there are also some marriages of children of Philip James OKE from 1866 onwards (3 in total) but I was not sure if these are connected with your family
I can't find any record of OKE family or Temperance THOMAS arriving in south australia but the records in those days were all over the place and often not recorded or lost Temperance was born c1830 australia but I can't find which state.She may have been born in SA?
do you have the deaths of the four children for Paul OKE ?