I'm searching for Irish records for my gg grandfather Ernest John CRAIG (known as John), born 18 Oct 1829 at Londonderry, Ireland, and died 26 July 1894 at Moolap, Victoria, Australia. His parents are William Craig and Sarah Semple Brown. I'm keen to know where he lived and what he and his family did in Ireland.
There is an old book of John's in which he has written his name and location as "John Craig, Gortrea". This could align with a family rumour that he "came from Galway".
John migrated to Australia aboard the Bussorah Merchant in 1850 and is listed as a presbyterian.
I have verified his place and date of birth from shipping records and also a marriage certificate. Note that one church record shows dob as Oct 1828, not 1829 as in all other records.
I've not had any real experience searching Irish records but am having some difficulties finding out more. I'm hoping someone can either find something or point me in a direction. Thanks in advance,