using familysearch.org ( IGI ) there are 2 other enteries for the parents of William & Mary with regards to a Naomi CROWDEN as their daughter, they are :-
DOB 13 Nov 1828
DO Christening 16 feb 1829 St Mary-Wesleyan, Ely, Cambridge.
DOB 13m Sep 1830
DO Christening 20 March 1831 at Wesleyan, Chatteris, Cambridge. By the way Ely and Chatteris are only 12 miles away. Look forward to your reply or contact me direct at firstname.lastname@example.org