The island was part of the Manila and Subic Bay Harbor Defense Command.
La Monja Island, Manila Bay off Mariveles Harbor, from CSDG
El Fraile Island, pre Fort Drum Construction, from CSDG.
Fort Drum Turret at Sandy Hook from CSDG.
Turret Pan Rigging, Fort Drum Construction, Fraile Island from CSDG.
Turret Pan, Fort Drum Construction, Fraile Island from CSDG.
Turret Ring Bolts, Fort Drum Construction, Fraile Island from CSDG.
Fort Drum construction from CSDG.
