Hi Rosie,
I think we may have a connection, or at least I hope I am on the right track! My 3rd Great Grandfather, William Shambrook could possibly be the brother to your James who married Ann Rodd.
William Shambrook married Rachel Copp around 1858 in Devon. In the 1851 Census, I found William and his brother Henry were servants working for Joshua Downing. Joshua was a neighbour to Thomas Copp where James was working.
William's parents were said to be Henry Shambrook and Ann Huxtable who married in 1830 at Tawstock. They had a son named James who was born around 1832, Fremington. So I'm hoping that this is your James.
William Henry b 1836, I believe was a son of James and Ann. He was suppose to have come out to Queensland, Australia around 1895. My Great Grandfather James Shambrook, son of William and Rachel, come out around 1885.
Look forward to hear from you!
Cheers
Leanne