With Gustave Bertrand's 1973 publication of his "Enigma", substantial information about the origins of Ultra began to seep out, and with F.W. Winterbotham's 1974 best-seller "The Ultra Secret", the dam began to burst.
With Gustave Bertrand's 1973 publication of his "Enigma", substantial information about the origins of Ultra began to seep out to the broader world public. With F.W. Winterbotham's 1974 best-seller "The Ultra Secret", the dam began to burst.