Captain Walter Fried's Fish Notes reporting back to the US Army in Arlington Hall on British progress in breaking Tunny (Lorenz) and attempting to break Sturgeon (Siemans)

The original documents are held in The American National Archive (NARA) College Campus Washington

NR 803 and 2612 Fish Notes by Walter Fried BOX 174 and 880

Formatted for HTML and PDF by Tony Sale (c) October 2003





INDEX

Fish Notes #F 05 18 March 1944
Fish Notes #F 07 23 March 1944
Fish Notes #F 14 3 April 1944
Fish Notes #F 22 17 April 1944
Fish Notes #F 36 7 May 1944
Fish Notes #F 46 12 June 1944
Fish Notes #F 46 Colossus MK II
Fish Notes #F 46 Sturgeon
Fish Notes #F 50 21 June 1944
Fish Notes #F 55 2 July 1944


In #71 Annex, Elementary Screed on Delta D Counts and Colossus Runs.


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Delta D Counts
Details of Techniques
Modifying considerations
The final 32-letter count
Some wrong settings
Slides
Summary of Techniques
Runs in common use
Odds on results

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