Well, I have seen some Spellers being deported to Australia and Van Diemans Land after being convicted in Bury St Edmunds, James and George being the ones I was most interested in. But of course the details are so scant that the entries could refer to anyone of that name. There were lots of Spellers around in Essex and some in Suffolk in that era.
But you do have a point. It would have been difficult for someone to come back to England I suppose after serving a sentence across the world. And to get a good job on the railway, well yes, I see what you mean.
It was just a thought on my part.
Thanks for your observations.
Diana