Another source, a member of Captain William W. Parker's battery, posted near the Peach Orchard:
[July 3] Presently a barn near by, where a number of Federal wounded had been put the night previous, was discovered to be on fire. The enemy's shells had ignited this building in which their own wounded lay. Andrew Barker, always kind and impulsive, raised the cry, "The wounded! The wounded!" Captain Parker ordered the battery to cease firing, and our boys and others of the battalion [Col. E. P. Alexander's] at once went to the rescue of these unfortunates, though it is feared some of them were burnt to death.
("Where Men Only Dare to Go!" or the Story of a Boy Company, by Royall W. J. Figg, Parker's battery, Richmond, VA: Whittet & Shepperson, 1885, p. 143)