I've only searched my father in the '21 census and it has cleared up one problem but created several more. I knew he and his two siblings were born out of wedlock, but I found a possible marriage for his mother in 1920, but the certificate gave a different name for her father so I discounted it. The census shows my father as a visitor, and his sister as an adopted daughter of another family at their address. Looking at the marriage certificate again I see she gave this address as her home and one of the witnesses was the occupant shown in '21. So the marriage of Edith Mary Coomber in Devonport is confirmed, but where on earth did she and her husband go and where is her third child Thomas William Henry Coomber who was born in 1916? Why does one mystery always create two more?