Margaret and Eliza Searls

I am trying to trace Margaret Searls born around 1846 and her sister Eliza Jane Searls born around 1841. Eliza's death certificate in NSW Australia states that she was born in Cork and her father was John Searls a pound keeper and painter and mother was Hannah Watson. There is a John Searls living at New Cork Road Inishannon, County of Cork listed in   Griffiths Valuations which recorded heads of households who held or leased land in the 1850's and 1860's.

Does any one have any information about marriage and birth records for John Searls, Hannah son or Margaret or Eliza Searls.