Breaking ‘Fish’ Codes at Bletchley Park

This is a critical, learned edition of the General Report on Tunny with Emphasis on Statistical Methods (aka The Newmanry Report), prepared in 1945 and declassified in 2000. The Report was a technical account of what the team of cryptanalysts did in their work at Bletchley Park during WWII. The editors of this edition have supervised its transcription into a carefully typeset edition that is both historically faithful to the original text and provides helpful footnotes, endnotes, essays, and glossaries that will assist historians, academics, and anyone interested in espionage and cryptography in interpreting the report.