Annie Chapman. Mitre Square had three connecting streets: Church Passage to the north-east, Mitre Street to the south-west, and St James's Place to the north-west. As PC Harvey had seen no-one exiting from Church Passage, and PC Watkins saw no-one the square from Mitre Street, the murderer must have left the square northwards through St James's Place towards Goulston Street, where he had dropped the section of Eddowes's blood-stained shawl. Goulston Street was within a quarter of an hour's walk from Mitre Square, on a direct route to Flower and Dean Street where Eddowes had lodged, indicating that her murderer likely also resided nearby and had headed in the direction of his home after the killing. The graffito found above the shawl may or may not have been related to the murder, but either way it was washed away before dawn on the orders of Metropolitan Police Commissioner Sir Charles Warren, who had feared that, should members of the public see the inscription, anti-Jewish riots may ensue. Major Henry Smith, acting Commissioner of the City Police, claimed in his memoirs to have discovered bloodied water in a public sink in a court off Dorset Street, and as the water was slowly running out of the basin, he calculated that the Ripper had been there only moments before. Ripper author Martin Fido thought it unlikely that the culprit would wait to wash his hands in a semi-public place about forty minutes after the crime, and Smith's memoirs are both unreliable and embellished for dramatic effect. There is no mention of the sink in the official police reports. Correspondence "Saucy Jacky" postcard On 1 October, a postcard, dubbed the "Saucy Jacky" postcard and signed "Jack the Ripper", was received by the Central News Agency. The author claimed responsibility for the murders of both Stride and Eddowes the previous day, describing 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 this correspondence was postmarked more than 24 hours after the killings took place—long after all details were known by journalists and residents of the area. Police officials later claimed to have identified a London-based journalist as the author of this postcard, which they dismissed as a hoax; an assessment