On 1 October, a postcard, dubbed the "Saucy Jacky" postcard and signed "Jack the Ripper", was received by the Central News Agency. It claimed responsibility for Stride's and Eddowes's murders, and described the killing of the two women as the "double event", a designation which has endured. It has been argued that the postcard was mailed before the murders were publicised, making it unlikely that a crank would have such knowledge of the crime, but it was postmarked more than 24 hours after the killings took place, long after details were known by journalists and residents of the area. Police officials later claimed to have identified a journalist as the author of the postcard, and dismissed it as a hoax, an assessment shared by most Ripper historians.