Everybody, thank you so much for your help on this... I certainly have a lot of work to do!
Regarding Anne (the daughter on the 1851 census not mentioned in William's will) I wonder if she was actually a daughter-in-law of Margaret as I notice on the census there are grandchildren recorded on the census and in 1844 I have found a marriage between William Wood Winstanley and possibly Anne Davies. (I say possibly as there are other names on there)... Just a thought.
Frustratingly, I cannot find Margaret & William's marriage - or record of birth for the legit children but I shall persevere! Thanks for the link to Lancs OPC Peter, I had not come across this site before and have possibly found Sarah Bryce's baptism record on there.
I am puzzled why, like Tecwyn has said it took 4 years for the will to be proven.
As for dropsy, it can be caused by other organ disease but according to what I have read, it usually is explained further on the death certificate. My certificate just says Dropsy which can suggest it is all over - which can apparently be a symptom of blood poisoning, which could be nothing - a lazy registrar maybe... or could be very exciting
Maidmarion, thanks for pointing out it was Margaret's death - I hadn't really considered that! Oversight I guess... was stuck on William so much!!
Linzi