Many thanks for everyone's help - I will go off for a little while and investigate and try and put all the pieces together - I had also been having trouble working out why the two boys seemed to be away from their parents in the 1871 census. I had seen that Betsey had died, so couldn't follow that up!
I tend to try and find out as much about the children as I can, and then if I can't find the parents I try and trace the children as sometimes it can turn out someone is staying with a relative etc, but I've hit a block with Walter J and Eliza, so thanks again for your help!
Laura