You've got me on this one.I have some Rosetta's in the tree but not a Gresham in sight at present.I am going to have to look into this a bit further. A couple of George's fit the bill as being around at that time but obviously not with Rosetta?
I have a Rosetta Cracknell that married James William Ferdinando in 1859, I only have one son called James at present.However, she would still have been a Ferdinando as her husband died in 1896!
I will have a trawl around and see if any of my co-researchers know anything more.You never know, we might find something.
Thanks for posting this though, it all adds to the history.