Many thanks to Mel, for helping me locate Glanymor. I also had a reply from Reg Davies who made the following point. (Apologies to experts who already knew this but it was new to me so I thought I'd share it.) 'Some of the census returns from Dinas Cross show that the enumerator did not record the data as he walked along the roads and lanes there. So the position of a house in the census may not give you its geographic location.' They knew how to make things difficult for us didn't they! Regards Heather