Lucas Born Liverpool England
Charles Lucas Married Selina Pitt 1872 West Coast Australia 1872
mother
Mary Aloysia Lucas nee Orrell born Ormskirk Lancashire
married
Marshal Gilchrist Australia 1858
nothing more known of this side of the family
Uncle of Charles was Robert Lucas Veterinary Surgeon of Liverpool England
This may or may not be your Lucas' 2 different families here
1841 UK Census
George b 1811 Manchester, England, an Iron Dresser
Mary A b 1816 Liverpool
George 1839 Liverpool,scholar
Lucy 1842 Liverpool, Scholar
James 1848, Cheshire
Mary 1851 (2 months) Liverpool
1851 UK census
Mary A b 1803 Ormskirk, Lancashire, Widow, Occupation Ladies Jenniary
Charles b 1830 Liverpool, Lancashire, Marnier (perhaps mis-transcribed Mariner)
Jospeh b 1833 Liverpool, Lancashire, Engraver
They were living at 14 North Side, Boundary Street, Kirkdale, Liverpool.
There is someone on this forum with Gilchrist marriages type in Gilchrist in the box in the right hand corner