Browse Items (2 total)

Cooper Letter to Gov Hawaii-1912.pdf
This letter, with a 1922 preface and explanation from the Navy (who retained the original letter), was written by Judge Henry E. Cooper of Hawaii, to then Governor of Hawaii, W.F. Frear. According to the letter, Cooper was concerned that a British…

Date: 1912-01-12

PanAm Codebook.pdf
This book was used by radiomen and navigators working for Pan Am Airways, during the 1930's. Anyone listening in to the transmission, who didn't have a copy of these codes, would not have understood the message. This excerpt features the code word…

Date: 1936-08-01

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