Yes, I also have her marrying Thomas Cowin in 1824. As for the other name – sorry it was a slip of the brain – Jane had a daughter in 1816, christened Esther Jane Killip. Her father was Robert Henry Oswald, according to the Braddon Parish Records. Esther Jane used her father’s name when she was married in 1849 – so she should be somewhere on the census in 1841 too, either as Esther Jane Killip or Oswald.