My blog post for Come Follow Me: D&C 14-17
Excerpt:Mary and Peter Whitmer Senior had five sons: David, Peter junior, John, Christian and Jacob. Through Oliver Cowdery’s close relationship with David, the Whitmers would become closely engaged in the early work of the Church.
Because of opposition in Pennsylvania, Oliver asked David if he and Joseph could move in with the family. Though the Whitmers never had met Joseph, they agreed. Before being able to fetch Joseph and Oliver, David had to finish plowing and preparing the spring fields. Miracles were employed, For as David found much of the work already done overnight, prior to beginning the work early in the morning.
This would be the first of many miracles for the Whitmers. Mary would be a witness of Moroni and the gold plates. Several of the Whitmer sons would physically handle the gold plates. David would be one of the Three Witnesses.