Searching for family of Mary Jane Barry

Hi, I am looking for information on Mary Jane Barry, apparently born in Limerick around 1827

Information from her death certificate gives the following:

• Died 1875, age at death 48 so suggests she was born in 1827
• Born in Limerick
• Mother Jane, surname unknown
• Father John, occupation Farmer
• She had been in Victoria for 26 years at time of death so suggests she came to Victoria in 1849.

Mary married John Thomas Mulligan in Geelong, Victoria, Australia in 1853, at St Mary’s Catholic Church.  John’s signature being a “X”.

There is a Mary Jane Barry on the "Nelson" arriving November 1849 aged 22 which suggests she was born in 1827.  She was an assisted immigrant.

John & Mary had the following children, all born in Geelong.

Jane Frances (b:1854), Mary (b: 1856), John (b: 1858), Ellen (b: 1860), Cornelius (born: 1862), Susan (born 1864) & Catherine (born 1865).

My wife is a 2nd great granddaughter of Mary & John through Jane Frances Duncan (nee Mulligan).

Thanks Kevin