As Joseph was 30 on his marriage, giving his birth year as c1770, surely the baptism in 1789 would be too late?
I see now that the Joseph I have as baptised in 1761 cannot be the same one that married Lucy Tonge in 1800 as he would have been nearer 40 than 30 - unless of course he lied about his age as Lucy was only 21.
I think I need to find a Joseph baptism in 1769/1770/1771.
Thanks ladies, I've just seen your date correction for the baptism in 1769