Oh my, you people are GREAT!
Thank you Valda, the 1861 census you found would definately be spot on!
I would also guess that Mary Jane Pearce b. dec quarter 1857 would be the one with Jennifer's find in the 1881 census when Mary was visiting her grandparents

YAY. One step closer.
Jennifer, I have Samuel Henry's death certificate (he died in Australia, 1896)

Being that Mary was born end of 1857, maybe Samuel Pearce did die in the Sep quarter in 1857. How sad he possibly never met his daughter! Not to mention poor Catharine being a single mum by the time she was 28.
Do you think we can assume that Samuel's mother was Charlotte?