Carrying the powder down the covered way to the mine under fire

Union troops exploded mine at Petersburg to confuse Confederate troops, 30 July 1864.
Signed lower right: ARW.
Title inscribed below image.
Published in: Harper's Weekly, August 20, 1864 (reversed).
Gift, J.P. Morgan, 1919 (DLC/PP-1919:R1.2.52)
Reference print available in Ray, Plate 82 (p. 161).
Forms part of: Morgan collection of Civil War drawings.