After a bit more digging it would seem that Mary was a second wife and NOT mother to my ancestor. My ancestor's mother was probably
Elizabeth - according to a christening record found on familysearch in Buckfastleigh.
Name - "official" name and what they were known as
Mary .....
Date and place of birth
Names of parents
Date and place of baptism - if applicable
Details of each of his or her marriages - if any
James Willcocks
Occupation(s) - if any
Addresses where they lived (including county if in UK) - and please list which censuses you have or haven't found him/her on (if s/he lived in census times!).
1841 Cox Hill, Buckfastleigh, Devon (HO107 246 b12 folio 21 p37)
Her husband is a widower on 1851
Date, place and cause of death
between 1841-1851
Date and place of burial.
Details of will / administration of their estate - if applicable
Memorial inscription - if any
This is her son:
http://genealogistsforum.co.uk/forum...orge+willcocks