Research on Jeremiah Williams

I am searching for information on Jeremiah Williams and his wife Amy Knight. Jeremiah was born about 1768 in RI and married Amy Knight somewhere around Pomfret, CT about 1785. There were three children that I know of. They were: Jeremiah b. in CT about 1793, John b. about 1801, and Zenas b. ?. It seems that after their children were born, they just fell off the map. I can't find what happened to them. If anyone has information on Jeremiah and Amy I would appreciate you contacting me. I have a new email address, rdwilliams4@verizon.net
Thanks,
Roger Williams