Thanks, David. So presumably Ellen Kilpack on the 1861 census should be Kissack too?
Mira Cain, aged 19, also appears on the 1861 Census. Do you agree that her age of 19 at that time fits with the baptism date of 12/9/1841 with parents Esther Kussack, Hugh Cain? I too have been unable to find any death record for Mira Cain or Mira Kneen, as she became, but George Kneen's 2nd marriage documentation in Australia states he is a widower.