Ahh I see, yes Henry and Mary would certainly fit especially when you consider the names of their other children (thank you for that info Annette) but reluctant to put this as fact unless I can prove it, especially as I'm doing this tree for someone else!
And no I couldn't find William in 1861, I was hoping he would turn up as I researched the rest of the Cope line as they all seem to live with and near eachother