. . "maritime defence programmes" . . . . . "1539\u201347" . "national fortification programme initiated in 1539" . . . . . . "Henrician forts" . . . "Device programme" . . . . . . . "coastal defence works" . . . . . . . . . . . . . . "device forts" . . . "Henrican fort" . "Device fort" . . "a major scheme" . . . "Henrician defences" . . . . . . "Device plan" . . . . "Device Fort" . "Device Forts" . . "device" . . "Device Forts" . .