"Herbert Yardley"@en . . "Herbert Osborn Yardley"@en . . "Yardley, Herbert"@en . . . "1889Z"^^ . "1958Z"^^ . "Herbert Osborn Yardley (April 13, 1889 \u2013 August 7, 1958) was an American cryptologist. He founded and led the cryptographic organization the Black Chamber. Under Yardley, the cryptanalysts of The American Black Chamber broke Japanese diplomatic codes and were able to furnish American negotiators with significant information during the Washington Naval Conference of 1921-1922. He wrote The American Black Chamber (1931) about his experiences there."@en . "1958-08-07Z"^^ . "1889-04-13Z"^^ . . "American cryptographer" .