The Security Service: First World War Historical Reports and Other Papers
This series contains the official history of the Security Service work during World War I compiled at the request of the Committee of Imperial Defence. The duties of the Security Service were principally the control of aliens within and entering the UK, and counter-espionage within the UK and within the Empire.
PLEASE NOTE: Records within this series are available to download free of charge as part of the Digital Microfilm project.
Within each transfer, the records in this series are arranged alphabetically by branch and in former reference order within each branch.
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