Jack the Ripper, pseudonymous murderer of at least five women, all prostitutes, in or near the Whitechapel district of London’s East End, between August and November 1888. The case is one of the most famous unsolved mysteries of English crime.

Some dozen murders between 1888 and 1892 have been speculatively attributed to Jack the Ripper, but five are considered canonical: Mary Ann Nichols (found August 31), Annie Chapman (found September 8), Elizabeth Stride (found September 30), Catherine Eddowes (found September 30), and Mary Jane Kelly (found November 9).

All but one of Jack the Ripper’s victims were killed while soliciting customers on the street. In each instance the victim’s throat was cut, and the body was usually mutilated in a manner indicating that the murderer had at least some knowledge of human anatomy. On one occasion half of a human kidney, which may have been extracted from a murder victim, was mailed to the police. The authorities also received a series of taunting notes from a person calling himself Jack the Ripper and purporting to be the murderer. Strenuous and sometimes curious efforts were made to identify and trap the killer, all to no avail. A great public uproar over the failure to arrest the murderer was raised against the home secretary and the London police commissioner, who resigned soon afterward.

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