Hi Fred
Will certainly have another look at all when I next visit.
How certain are you that Edith & Annie (Elizabeth) did die? I say this because if John & Mary were migrant workers perhaps they left Edith & Annie (Elizabeth) with family?
There is a Edith M Morgan (born 1899) and a Annie Morgan (1901) as nieces to a Mary Ann Lewis (1848) in Bargoed on the 1911 census. I can't identify where the children were born, the original shows "Coedfaide, Monmouthshire, Wales", which is just nonsense but two children of the right name and age seem's "unusual"? Also the 1911 census does not show the children has having died!
Ray