Thanks Kate.
I did find a Mary Furneaux that married a James Willcocks 04/09/1834. That would make her 50.
I also noted that James Willcocks' first wife was named Elizabeth and that she was buried in 1830 - but I'm such a wally that I didn't note where I found that - and it was only a week ago....I'm suspecting that it was from an unreliable source otherwise I'd have noted it on my tree....
So - it's not 'Mary someone that married James Willcocks' but 'Elizabeth someone that married James Willcocks'..... probably