Mary born 1757 buried 1831 married to John REFFELL born about 1767

[EdwinReffell]

I have been unable to find the maiden name for Mary born 1757 buried 1831 in St Leonard Shoreditch married to John REFFELL (also found as REFFOLD, REFFIELD, REFFELD, REFFEL, REFFELLS and RIFFELL) who was christened 1767 in Dorking but for whom I have neither marriage nor death year. For them I have found 4 children, one of whom is Joseph born 1795 who was prominent in Sierra Leone, Africa where he died in 1829 and who may have had children as at least one REFFELL line in England originates in West Africa. John's parents are Thomas and Mary nee BILLINGHURST and grandparents are Joseph and Sarah nee HARRISON. Many thanks for any help anyone can give me on this as I lost my tree of about 3000 persons last week when the data chip of the USB memory fell out and vanished. So now I have about 500 people in my tree. Over 30 years of family searching and all files I wanted kept safe are now gone.