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Olga Gray and the Woolwich Arsenal Spy Ring
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Catalogue reference: ADM 131/107
This record is about the Anti-submarines devices: indicator nets; net drifters; explosive and throwing charges;... dating from 1914. Nov - 1918. Nov in the series Admiralty: Plymouth Station: Correspondence. It is held at The National Archives, Kew.
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Anti-submarines devices: indicator nets; net drifters; explosive and throwing charges; chain trawls; Bush audio telephone trials; depth charges; bombs and hydrophones.
ADM 131
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Anti-submarines devices: indicator nets; net drifters; explosive and throwing charges;...
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