Looking for Simes of Somersetshire

Robert Simes born about 1830 in Somersetshire.married Mary Ann Brewer in 1853 Wales. They came to Rockhampton Queensland Australia early 1850's.
They had 4 children.
Mary Ann Simes born- 1854
William Henry Simes born- 1856
Rachel Simes - 1859
Thomas Brewer Simes - 1863.
all born in Rockhampton.