the Appendix materials, appendices begin on page 143. Provided on page 143 is a still censored letter from Fabian to Safford from 30 August 41. Presented are also other newer materials recently declassified on radio silence, codebreaking, RFP (Radio Finger-Printing), and "Fundamental Ripple" displays. Philip H. Jacobsen Pearl Harbor: Radio Officer Leslie Grogan of the SS Lurline and his Misidentified Signals (Cryptologia April 2005) Details errors, and conflicting stories within the works of Villa, Wilford, Stinnett, Toland, and Farago. Also covers the missing report of Leslie Grogan dated December 10, 1941 titled "Record for Posterity" and compares this with the 26‑year‑old "remembrances" within Farago's "The Broken Seal". Jacobsen concludes what Grogan heard were Japanese commercial ships sending routine plain language radio messages in their specialized Kata Kana telegraphic code. Philip H. Jacobsen Radio Silence and Radio Deception: Secrecy Insurance for the Pearl Harbor Strike Force (Intelligence and National Security, Vol. 19, No.4 Winter 2004) Author reviews and refutes various claims of Robert Stinnett and most notably the works of Timothy Wilford regarding radio silence. Philip H. Jacobsen No RDF on the Japanese Strike Force: No Conspiracy! (International Journal of Intelligence and Counterintelligence, Volume 18, Issue 1, Spring 2005, pp. 142–149) John C. Zimmerman Pearl Harbor Revisionism: Robert Stinnett's Day of Deceit (Intelligence and National Security, Vol 17, No.2 Summer 2002) Various claims examined and refuted. Of special note: Toland and Stinnett claims of radio silence violations. History of GYP-1 General History of OP-20-3-GYP; Activities and Accomplishments of GY-1 During 1941, 1942 and 1943, RG38 CNSG Library, Box 115, 570/197 NA CP "JN-25 has no part to play in the story of Pearl Harbor". Duane L. Whitlock, The Silent War Against the Japanese Navy available online from the Corregidor Historical Society. Between June 1939 and December 1941 Washington did decrypt a few JN-25 messages, but they provided little insight into the current operational or intelligence picture. Costello, John Days of Infamy. Pocket Books hardback, 1994. Covers the issue of why MacArthur was unprepared in detail, including mention of access to intelligence. Bartlett, Bruce. Cover-Up: The Politics of Pearl Harbor, 1941–1946 (1979). Reviews the findings of the various congressional inquiries into this attack. Kimmel, Husband Adm. Admiral Kimmel’s Story (1955). During the attack Kimmel was the U.S. Pacific Fleet commander at Pearl Harbor (1 February – 17 December 1941). Ed., Colin Burke editing. (Posthumously published article, by Phillip H. Jacobsen) "Radio Silence