If as you say Reuben was "farmed" out to be brought up by say a family member or friend, would he not still appear on the census form's under his own name of BRAIN. If it was a formal adoption I would assume that his name would be changed to that of the people who adopted him,then he changed it back when he married. Or is that to fanciful, or am I just getting confused,maybe I wasn't a BRAIN after all.