I am a direct descendent of Stephen Atchinson, brother of Sylvestus. I would love to see a copy of the letter you referred to. Stephen had a daughter, Philo (Phila) Atchinson Murray. Her daughter was Maria Elizabeth and she married Joseph Foster. Their son, Orie Joseph, was my great-grandfather. Any info I have I am more than happy to share but it isn't very much. I do have pictures of Phila and her three daughters.