Demolition, Buildings 19-20, Arsenal LotHarpers Ferry National Historical ParkDemolition- Buildings on Arsenal Lot (Buildings #19-20), 3 1/2 x 3 1/2 Negative Filed. Original caption: NHF-1170-1174, Demolition- Buildings on Arsenel Lot, Buildings 19-20, 3 1/2" x 3 1/2" Negative Filed, 1959.