I am trying to trace family history of Robert Prentice born in Adelaide (South Australia) in 1860. He married Bridget Ahearn (born 1856 in Ireland)in 1882 in Adelaide. 2 sons James b 1883(my Grandfather) & Robert born 1885 I cannot find any info. on his parents James & Margaret. cannot find any siblings or where his parents came from, cannot find a birth certificate for him,,, Can anyone help me??????