Couldn't everything make a lot more sense if William Richard(s),the husband of Hannah,was the brother of Sophia Priscilla on the 1871 Furnace,Sguborycoed census?He is given as born Talybont as,I think Hannah,s husband is in 1911,if it is him with the Shugars in Pontypridd 1911.There is an apparent couple of years difference,but I'm not sure William(or Lydia Harriet) were ever really traced.This would also put him relatively geographically close to Hannah.
Regards
Roger