Canonical five
The canonical five Ripper victims are Mary Ann Nichols, Annie Chapman, Elizabeth Stride, Catherine Eddowes and Mary Jane Kelly.
Nichols' body was discovered at about 3:40 a.m. on Friday 31 August 1888 in Buck's Row (now Durward Street), Whitechapel. The throat was severed deeply by two cuts, and the lower part of the abdomen was partly ripped open by a deep, jagged wound. Several other incisions on the abdomen were caused by the same knife.
Chapman's body was discovered at about 6 a.m. on Saturday 8 September 1888 near a doorway in the back yard of 29 Hanbury Street, Spitalfields. As in the case of Mary Ann Nichols, the throat was severed by two cuts. The abdomen was slashed entirely open, and it was later discovered that the uterus had been removed. At the inquest, one witness described seeing Chapman with a dark-haired man of "shabby-genteel" appearance at about 5:30 a.m..
Stride and Eddowes were killed in the early morning of Sunday 30 September 1888. Stride's body was discovered at about 1 a.m., in Dutfield's Yard, off Berner Street (now Henriques Street) in Whitechapel. The cause of death was one clear-cut incision which severed the main artery on the left side of the neck. Uncertainty about whether Stride's murder should be attributed to the Ripper, or whether he was interrupted during the attack, stems from the absence of mutilations to the abdomen. Witnesses who thought they saw Stride with a man earlier that night gave differing descriptions: some said her companion was fair, others dark; some said he was shabbily dressed, others well-dressed. Eddowes' body was found in Mitre Square, in the City of London, three-quarters of an hour after Stride's. The throat was severed, and the abdomen was ripped open by a long, deep, jagged wound. The left kidney and the major part of the uterus had been removed. A local man, Joseph Lawende, had passed through the square with two friends shortly before the murder, and he described seeing a fair-haired man of shabby appearance with a woman who may have been Eddowes. His companions, however, were unable to confirm his description. Eddowes' and Stride's murders were later called the "double event". Part of Eddowes' bloodied apron was found at the entrance to a tenement in Goulston Street, Whitechapel. Some writing on the wall above the apron piece, which became known as the Goulston Street graffito, seemed to implicate a Jew or Jews, but it was unclear whether the graffito was written by the murderer as he dropped the apron piece, or merely incidental. Police Commissioner Charles Warren feared the graffito might spark antisemitic riots, and ordered it washed away before dawn.
Kelly's gruesomely mutilated body was discovered lying on the bed in the single room where she lived at 13 Miller's Court, off Dorset Street, Spitalfields, at10:45 a.m. on Friday 9 November 1888. The throat had been severed down to the spine, and the abdomen virtually emptied of its organs. The heart was missing.
The canonical five murders were perpetrated at night, on or close to a weekend, and either at the end of a month or a week or so after. The mutilations became increasingly severe as the series of murders proceeded, except for that of Stride, whose attacker may have been interrupted. Nichols was not missing any organs; Chapman's uterus was taken; Eddowes had her uterus and a kidney removed and her face mutilated; Kelly's body was eviscerated and her face hacked away, though only her heart was missing from the crime scene.
Historically, the belief that these five crimes were committed by the same man derives from contemporary documents that link them together to the exclusion of others. In 1894, Sir Melville Macnaghten, Assistant Chief Constable of the Metropolitan Police Service and Head of the Criminal Investigation Department(CID), wrote a report that stated: "the Whitechapel murderer had 5 victims—& 5 victims only". Similarly, the canonical five victims were linked together in a letter written by the police surgeon Thomas Bond to Robert Anderson, head of the London CID, on 10 November 1888. Some researchers have posited that while some of the murders were undoubtedly the work of a single killer, an unknown larger number of killers acting independently were responsible for the others. Authors Stewart P. Evans and Donald Rumbelow argue that the canonical five is a "Ripper myth" and that while three cases (Nichols, Chapman, and Eddowes) can be definitely linked, there is less certainty over Stride and Kelly, and less again over Tabram. Conversely, others suppose that the six murders between Tabram and Kelly were the work of a single killer. Dr Percy Clark, assistant to the examining pathologistGeorge Bagster Phillips, linked only three of the murders and thought the others were perpetrated by "weak-minded individual[s] ... induced to emulate the crime". Macnaghten did not join the police force until the year after the murders, and his memorandum contains serious factual errors about possible suspects.