From a very well-sourced tree on ancestry (with marriage and death certs)
Laurence CALLAGHAN was born 31 July 1835 in Meath, Ireland to parents (Richard) Laurence CALLAGHAN and Mary HOOLIGAN
He married Mary McDERMOTT on 19 Jan 1869 in Orange NSW (on cert his name is Lawrence CALLGHAN) and he is a gold digger. The consent of Patrick McDERMOTT, father of the bride was given.
regards,
Ros