I am the ggrandson of Joseph Stephen Vance and Lydia Van Valkenburg. You mentioned Martha Jane Van Valkenburg as your ggrandmother. She was my ggrandaunt. I wonder do you by chance have any information on the descendants of Lydia Van Valkenburg and Joseph Stephen Vance. Unfortunatley my father is deceased and so are his brothers and sisters, and I am having difficulty finding information on their families. Any help would be appreciated.