From the Richmond Sentinel, 7/6/1864, p. 1

Fatal Accident from a Shell. - Two boys, between ten and twelve years of age, sons of John S. Mosby, of Henrico, last Sunday found an unexploded shell near the Yellow Tavern battlefield and set about opening it. While they were working upon it, it, from some cause, exploded and killed them both on the spot. Similar accidents are constantly occurring, and yet it seems impossible to prevent persons, especially children, from trifling with shells.