Due to the location of Mitre Square, the City of London Police under Detective Inspector James McWilliam joined the murder enquiry alongside the Metropolitan Police who had been engaged in the previous murders. At about 3 a.m. on the same day as Eddowes was murdered, a blood-stained fragment of her apron contaminated with fecal matter was found lying in the passage of the doorway leading to Flats 108 and 119, Model Dwellings, Goulston Street, Whitechapel. Above it on the wall was a graffito in chalk commonly held to have read: "The Juwes are the men that Will not be Blamed for nothing". The writing 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 feared that it would spark anti-Jewish riots. 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 saw no-one from Church Passage, and PC Watkins saw no-one from Mitre Street, the murderer must have left the square northwards through St James's Place towards Goulston Street. 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 lived, hinting that her murderer also resided nearby and headed back there after the killing.