After reading through the "Book of the Wilders. A CON T R I B U T I N HISTORY OF THE WILDERS" by Rev. Moses H. Wilder, Agnes (Henry's mother) is said to have born a son named John but it did not mention anything about Henry. Is there a possibility that there is a full brother to Henry that is not listed on this website or is there some confusion that Henry is actually John? See below for the link to the book.