Hi,
I live in Topsham and at present am doing some research on the Follett family on behalf of Topsham Museum. John Follett (1806-1866), who I believe wrote the letter in your possession was the brother of William Webb Follett, who was for some time the Attorney General. John was a Timber and Hemp merchant, who lived for some years in Mount Wear House, Countess Wear, Topsham.
I would be delighted to learn the contents of the Follett letter in your possession. If you wish to find a good home for it, Topsham Museum would be pleased to find one (with due attribution to yourself).
Best regards,
Jethro_William