I might be able to help. If the John Briggs b 1800 was married to Rosanna Jonah? I am a descendant of Rosanna's sister Margaret Jonah Gunning. I have worked for a few years putting all the Jonah's in my database (about 700 so far). I have John's father as John and a sister Sarah married to a Wilbur. If you want to contact me directly at Mdaniels67@aol.com
and give me what you have so far. I would be more than glad to do some digging and see what I can find. There is also Freelove Briggs b 1785 Hillsborough, that should somehow connect to this same group, she married a Douthwright.