The island was part of the Manila and Subic Bay Harbor Defense Command.
Fort Drum Bow Construction, Fraile Island from CSDG.
Fort Drum lowering turret pan from CSDG.
Fort Drum, Fraile Island from CSDG. Wall.
Fort Drum, Fraile Island from CSDG Look East Sep. 1909.
Fort Drum, Fraile Island from CSDG. Look South Sep. 1909.
Fort Drum, Fraile Island from CSDG. Look South Sep. 1909..
