Machine Reading Telegraph Code Books

Data contains the “plain text” of those code books in the collection for which such text was available. Note that these texts are generated with the help of optical character recognition (OCR) and are not transcribed without error.

The filename of each codebook matches its identifier on this site. For example, the identifier ciphersecretlett00larr matches the 1884 code book Cipher and Secret Letter and Telegraph Code, a text for which the full text is available on the Internet Archive. Within the file with this text has a filename that begins with “ciphersecretlett00larr”


Those interested in using computational methods and machine reading to analyze this collection of texts may find the following software and websites helpful:

Interesting keywords (ordered by weighted frequency)

Interesting bigrams (ordered by weighted frequency)

Keywords and bigrams ordered by weighted frequency.