It has been some time since you posted your Lydston.Have you received any response? Do you know if... 1.your Minerva Keen's father was Theodore Keen, mother Mary Neal? 2.your Minerva Keen's had a brother Josiah? 3.your John had a sister Mary Ann?
I have a Josiah Keen married to Mary Ann Lydston (m. 22 Nov 1832).Josiah is my gggreat grandfather.