I found that baptism at Bocking, it seems it's in the right time frame but the names of his parents (& some siblings) just don't fit at all. Isaac didn't name any of his children David or Susanna and neither of those names have been carried forward to future generations so I'm just not sure now.
However, I have had a bit of a breakthrough in a marriage I found between William Brown bachelor of Stambourn and Sarah Titterill spin on 5 Apr 1774 at Castle Hedingham, St Nicholas.
Sarah Tittrell IS a name Isaac gave to one of his daughters so things are looking up, a long way to go yet. Castle Hedingham is next on the list to look at!
I'm so very thankful for everyone's help, without it I would still be floundering as I live in NZ and have never been to the UK.
Cheers....Dawn