English: Example of obfuscated Morse code used to send covert messages during WWI. 'Extra dots' and 'abnormal spaces' in the word 'BERLIN.' See Charles E. Apgar recordings for context. Text in image: 'How secret messages are added to censored ones.' Original caption: 'The Above "Code" Diagram Shows How Secret Cipher Messages Could be Interspersed Through Regular Messages.'
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Captions
obfuscated Morse code used to send covert message
Code Morse obfusqué utilisé pour envoyer un message secret