Hi again, Yokel,
Entry 27a, Robert Duffield buried 19th January 1851, aged 61. Perhaps he would have reached 62 if he'd lived a bit longer into 1851, so a birth date of 1789 is pretty close to a 1788 baptism.
I'd better look in the 1841 Census of Taverham for him, though there's never much detail on there, it all depends on the enumerator..
Thanks very much for spotting that for me,
keith