Mary Ann Nichols, known as Polly Nichols, was the first canonical victim of the unidentified serial killer known as Jack the Ripper, who is believed to have murdered and mutilated at least five women in and around the Whitechapel district of London between late August and early November 1888.
The two earlier murders linked to the Whitechapel murderer are unlikely to have been committed by Jack the Ripper. When Nichols's murder was first associated with the series, it heightened both press and public interest in the criminal activity and general living conditions of the inhabitants of London's East End.