thank you everyone for all your help (and it has helped) . Elizabeth Ann and Dorothy kept the name Richardson so you must be right and either the marriage was not a happy one and husband/wife left or even bigamous

I have just traced my Dad's long lost sister (after 60 years) as she was 'farmed' out shortly after birth as my Granny couldn't cope after a long,very difficult labour & illness after; I've gained a cousin I (and she, I ) didn't know existed. What an emotional roller coaster!
thank you and 'happy hunting'