Sue, I think the message is too long. It would take hours of concerted research to answer all the possibilities. Surely looking at 1851 census should identify the respective families of all but child no.10, who is born later. By 1861, you should still have your three James. But one will be a widower, unless remarried. While some of the older children will have left home and married, some of the younger children should still be at home. As for James Davis (3) it certainly looks like he remarried to have two such young children. I'd be looking for consistency of age and birthplace of all three in earlier and later censuses. Free BMD has two possible marriages of James Davis with wife Olive. You probably need to look where she was born. Often the marriage occurred in the bride's parish. You don't give her age or birthplace. Peter