Democratic Sentinel, Volume 18, Number 10, Rensselaer, Jasper County, 23 March 1894 — United States Secret Codes. [ARTICLE]

United States Secret Codes.

' The secret codes used by the United States state department are the most carefully guarded of all the nation’s secrets. One of them is called the .“sphinx”—it is so guarded. The “sphinx" was devised by a NewYorker now in the state depaitment, and is as susceptible to changes as the combination lock of a safe. Hundreds of messages have been sent by it, and it has never leaked.