Jack the Ripper: The Whitechapel Murders, the Police File, and a Hundred and Thirty-Seven Years of Suspects.

Five killings, ten weeks, one autumn.

The Whitechapel Murders is the administrative name of a Metropolitan Police investigative file opened in April 1888 to cover a series of violent attacks on women in the East End of London, eleven of which (the so-called "Whitechapel Eleven") were placed in the file between April 1888 and February 1891. Within that broader file, five murders are conventionally identified as the work of a single killer, on the basis of consistencies in modus operandi, weapon, and victim type identified by the investigating officers in 1888 and substantially endorsed in subsequent historiography. These are the "canonical five": Mary Ann Nichols, killed on Buck's Row (now Durward Street) in the early hours of Friday, August 31; Annie Chapman, killed in the back yard of 29 Hanbury Street, Spitalfields, in the early hours of Saturday, September 8; Elizabeth Stride, killed in the passage of Dutfield's Yard off Berner Street (now Henriques Street) shortly before 1:00 a.m. on Sunday, September 30; Catherine Eddowes, killed approximately forty-five minutes later and three-quarters of a mile away in Mitre Square, City of London — the so-called "double event" — on the same night; and Mary Jane Kelly, killed in her room at 13 Miller's Court off Dorset Street in the early hours of Friday, November 9. Each of the five suffered throat-cutting; four of the five suffered substantial abdominal mutilation, with organ removal in three (Chapman, Eddowes, and Kelly); the post-mortem surgeons in three of the cases (Chapman, Eddowes, Kelly) recorded an opinion that the perpetrator had at minimum a butcher's or hunter's knowledge of anatomy. The investigation drew correspondence purporting to be from the killer to police and newspapers, three letters of which became central to the historical record: the "Dear Boss" letter received by the Central News Agency on September 27 and forwarded to Scotland Yard September 29; the "Saucy Jacky" postcard received by Central News on October 1; and the "From Hell" letter sent to George Lusk of the Whitechapel Vigilance Committee on October 16, accompanied by half of a preserved human kidney. The investigation was conducted under successive Assistant Commissioners Robert Anderson (Metropolitan Police, from September 1, 1888) and Sir Charles Warren (Commissioner until his November 8 resignation), with field direction by Chief Inspector Donald Swanson at Scotland Yard, Detective Inspector Frederick Abberline at the H Division (Whitechapel) office, and Inspector Edmund Reid of H Division CID; for the Eddowes (City of London) murder, the field investigation was led by Inspector James McWilliam of the City of London Police. No charge was ever brought; no conviction was ever obtained. The Metropolitan Police file remained administratively open into the 20th century and is now held at the National Archives at Kew under MEPO 3 series. Across the 137 years since, a literature variously estimated at exceeding one thousand published works has named more than a hundred individuals as the killer; none of the named candidates has been proven on the surviving evidence, and the standard of proof to which a 137-year-old murder case can now be brought is itself disputed within the field.

The documented record.

The canonical five

August 31, 1888 — Mary Ann "Polly" Nichols, Buck's Row, Whitechapel. Nichols, 43, was a casual prostitute living in lodging houses in the Whitechapel area. Her body was found at approximately 3:40 a.m. on Friday, August 31 by carman Charles Cross (also recorded as Charles Allen Lechmere) on Buck's Row. Verified The throat had been cut twice; abdominal injuries were not noticed at the scene in the gaslight but were identified at the morgue at Old Montague Street. The post-mortem was conducted by Dr. Rees Ralph Llewellyn, who noted abdominal mutilation. The Metropolitan Police investigation was opened the same day under Inspector John Spratling [1][2].

September 8, 1888 — Annie Chapman, 29 Hanbury Street, Spitalfields. Chapman, 47, was a casual prostitute also living in lodging houses (most recently at Crossingham's at 35 Dorset Street). Her body was found at approximately 6:00 a.m. on Saturday, September 8 by lodger John Davis in the back yard of 29 Hanbury Street. Verified The throat had been cut deeply; the abdomen had been opened; the uterus and parts of the bladder had been removed and taken away. Post-mortem by Dr. George Bagster Phillips, who recorded the opinion that the killer "must have had a good deal of anatomical knowledge." Investigation under Inspector Joseph Chandler [1][2].

September 27, 1888 — "Dear Boss" letter. A letter addressed "Dear Boss" arrived at the Central News Agency, postmarked from East London; it was forwarded to Scotland Yard on September 29. The letter, written in red ink, contained the signature "Jack the Ripper" — the first known use of the name. The letter taunted police and threatened to "clip the lady's ear off" of the next victim. The letter's authenticity as the work of the killer has been substantially disputed since 1888; Sir Robert Anderson, in his memoir The Lighter Side of My Official Life (1910), would write that the "Dear Boss" letter was the work of "a London journalist" identified to him at the time. The letter is now generally regarded by professional Ripperologists as probably a journalistic fabrication, while remaining the source of the killer's most-known name [3]. Disputed

September 30, 1888 — Elizabeth Stride, Dutfield's Yard, Berner Street. Stride, 44 (sometimes given as 45), was a Swedish-born casual prostitute. Her body was found at approximately 1:00 a.m. on Sunday, September 30 by Louis Diemschutz, the steward of the International Workingmen's Educational Club, as he drove a pony cart into the yard. Verified The throat had been cut once; there was no abdominal mutilation. The absence of mutilation in the Stride case has been variously interpreted as evidence that the killer was disturbed by Diemschutz's arrival (the standard reading) or as evidence that Stride was not a Ripper victim (a minority reading). Post-mortem by Dr. George Bagster Phillips. Investigation under Inspector Walter Beck [1][2].

September 30, 1888 — Catherine Eddowes, Mitre Square (the "double event"). Eddowes, 46, had been released from Bishopsgate Police Station, where she had been held overnight for drunkenness, at 1:00 a.m. on September 30. Verified Her body was found at approximately 1:45 a.m. by P.C. Edward Watkins of the City of London Police in the southwestern corner of Mitre Square — in City of London territory rather than Metropolitan Police territory. The throat had been cut; the abdomen had been opened; the left kidney and most of the uterus had been removed and taken away. The face had been mutilated — a notable departure from the previous canonical murders. Post-mortem by Dr. Frederick Gordon Brown of the City of London Police, who recorded an opinion that the killer "had considerable anatomical knowledge." The investigation was led by the City of London Police under Inspector James McWilliam [1][2].

September 30, 1888 (after the murder) — The Goulston Street graffito. At approximately 2:55 a.m., a fragment of Eddowes's apron was found in the doorway of 108–119 Wentworth Model Dwellings on Goulston Street, Whitechapel. Verified On the wall above the apron fragment was written in chalk what is variously transcribed as "The Juwes are the men That Will not be Blamed for nothing." Commissioner Sir Charles Warren, arriving at the scene before dawn, ordered the graffito washed off before it could be photographed, on the stated ground that its preservation might incite anti-Jewish riots in the East End. The decision — substantially controversial at the time and ever since — meant that the only photographic record is later approximate reconstructions. Whether the graffito was the killer's or a coincidental piece of antisemitic graffiti is unresolved. The fragment of apron itself was a key item of physical evidence linking the murderer to the Goulston Street location and into Whitechapel from Mitre Square [1][4].

October 1, 1888 — "Saucy Jacky" postcard. A postcard reached Central News in the morning of October 1, postmarked London and apparently referring to the "double event" of the previous night: "I was not codding dear old Boss when I gave you the tip... double event this time." The postcard's authenticity is contested on the same grounds as the "Dear Boss" letter; the two are widely regarded as products of the same hand, probably journalistic [3]. Disputed

October 16, 1888 — The "From Hell" letter and the Lusk kidney. George Lusk, the chairman of the Whitechapel Vigilance Committee, received in the post on October 16 a small parcel containing half of a human kidney and a brief letter beginning "From Hell" and proceeding "Mr Lusk, Sor I send you half the Kidne I took from one woman prasarved it for you tother piece I fried and ate it was very nise." Verified The kidney was examined by Dr. Thomas Openshaw of the London Hospital, who recorded the opinion that it was a human kidney consistent with that of an adult, and the Eddowes post-mortem record specified that her left kidney had been removed. Whether the kidney was specifically Eddowes's, or was an anatomical-specimen kidney sent as a hoax, is the central evidentiary question; Openshaw's contemporaneous opinion leaned toward the former, but the available scientific tests of 1888 could not establish identity with certainty. The "From Hell" letter is, of the three principal letters, the one most commonly regarded as having a non-trivial probability of authenticity, in part because of the accompanying physical evidence [3][5]. Claimed

November 9, 1888 — Mary Jane Kelly, 13 Miller's Court. Kelly, 25 (sometimes given as in her mid-20s), was a prostitute who unlike the previous victims worked from a rented room rather than from the street. Her body was found at approximately 10:45 a.m. on Friday, November 9 by Thomas Bowyer, sent by John McCarthy (Kelly's landlord) to ask for rent. Verified Kelly's body was mutilated to a substantially greater degree than the previous victims, in a process the post-mortem surgeon estimated to have taken between one and two hours; she had been killed in her bed. Post-mortem by Dr. Thomas Bond, whose detailed report — including the well-known statement that "the murders were no doubt committed by one man" who in Bond's opinion lacked formal anatomical training but had "the ordinary knowledge of a butcher" — is one of the principal Whitechapel investigative documents. Investigation by Inspector Walter Beck and Inspector Abberline [1][2].

The Macnaghten memorandum

Sir Melville Macnaghten, who joined the Metropolitan Police as Assistant Chief Constable in June 1889 (after the canonical five had ended), prepared in February 1894 a confidential memorandum responding to press claims at the time that the perpetrator of a recent murder — Thomas Cutbush — was the Ripper. Verified Two versions of the memorandum survive: an official version (the "Scotland Yard version") in the case file, and a personal version (the "Aberconway version") held in the papers of Macnaghten's daughter Lady Aberconway. The two versions agree on most points and diverge on others. Both name three suspects on whom suspicion had been "more or less" focused at the time, more strongly than on Cutbush: Montague John Druitt, "a doctor of about 41 years of age" (Druitt was actually a barrister, age 31 at the time of the murders); Aaron Kosminski, a Polish Jew resident in Whitechapel, "[who] had become insane owing to many years indulgence in solitary vices"; and Michael Ostrog, a Russian-born confidence trickster previously known to police. The memorandum is one of the principal contemporary documents identifying suspects, although as Macnaghten himself acknowledged, it is a recollection compiled five years after the events by an officer who had not been on the original investigation [4][6].

The Anderson and Swanson identifications

Sir Robert Anderson, Assistant Commissioner of the Metropolitan Police from September 1, 1888 and head of the CID at the relevant time, wrote in his memoir The Lighter Side of My Official Life (1910) that the killer was "a low-class Polish Jew" who had been identified by a witness ("the only person who had ever had a good view of the murderer") but whose identification the witness had refused to confirm in court because of the killer's ethnicity. Claimed Anderson did not name the suspect in the memoir. Chief Inspector Donald Swanson, who had been Scotland Yard's case-coordinator on the Ripper investigation, made marginal notes in his copy of Anderson's memoir (the "Swanson marginalia"), discovered in 1981 by a descendant of Swanson's: the notes name the suspect as "Kosminski" and add detail (that he was identified at the "Seaside Home," that "no other murder of this kind took place in London after the suspect had been identified," and that "Kosminski was the suspect"). The Swanson marginalia are the principal external corroboration of the Anderson identification [6][7]. Claimed

The Whitechapel Murders file

The Metropolitan Police file on the Whitechapel Murders is held at the National Archives at Kew under the MEPO 3 series, principally MEPO 3/140, MEPO 3/141, and MEPO 3/142. Verified The City of London Police records on the Eddowes murder are held separately at the London Metropolitan Archives. The Home Office records under HO 144 series include policy-level correspondence. The combined file is not complete — substantial portions were destroyed in the early 20th century in routine paperwork-disposal cycles, and additional material was lost in World War II bombing of the Home Office records repositories. What survives is principally the major-incident reports, the witness statements, the Macnaghten and Bond reports, and the official correspondence between Whitechapel, Scotland Yard, the City of London Police, and the Home Office [4][6].

The principal suspect candidates across 137 years.

Aaron Kosminski

Polish-Jewish hairdresser resident in Whitechapel during the murders, committed to Colney Hatch lunatic asylum in February 1891 and to Leavesden Asylum in 1894, where he died in 1919. Claimed Named in the Macnaghten memorandum, in the Anderson memoir (anonymously), and in the Swanson marginalia (by name). The principal Macnaghten-Anderson-Swanson candidate. Documentary support is substantial in terms of contemporary police suspicion; documentary support that he was actually the killer rests on a witness identification whose witness and circumstances are not fully documented in the surviving record. The 2014 shawl DNA claim (below) advanced a forensic identification of Kosminski; the claim is substantially contested.

The 2014 shawl DNA claim and its critique

In 2014, Russell Edwards, working with molecular biologist Dr. Jari Louhelainen of Liverpool John Moores University, published Naming Jack the Ripper, claiming that mitochondrial DNA recovered from a shawl Edwards had purchased at auction — said to have been recovered from the Eddowes murder scene — matched a descendant of Aaron Kosminski's sister and (separately) a descendant of Catherine Eddowes. Disputed The claim was published in the peer-reviewed Journal of Forensic Sciences in 2019 by Louhelainen and Adam Rutherford's then-collaborator David Miller (Journal of Forensic Sciences, March 2019, "Forensic Investigation of a Shawl Linked to the 'Jack the Ripper' Murders"). The peer-reviewed publication was subject to a substantive methodology critique by population geneticist Hansi Weissensteiner and colleagues at the Medical University of Innsbruck in a series of letters to the editor and subsequent commentary, raising specific objections: the mitochondrial DNA "matches" reported were to common European haplogroup variants present in a substantial fraction of the modern population and therefore not individually identifying; the shawl's chain of custody from 1888 to its 2007 auction acquisition by Edwards is not documented in a manner that supports the forensic premise; potential contamination across more than a century of unknown handling is not adequately addressed by the published protocol. Subsequent commentary by Mick Reed, Jari Louhelainen's own clarifications, and independent assessment by the molecular biologist Adam Rutherford in The Book of Humans (2018) have substantially undermined the strength of the 2014/2019 identification claim. The shawl evidence is now generally regarded within the academic forensic-genetics community as not establishing identification of Kosminski as the Ripper [8][9].

Montague John Druitt

Barrister and assistant schoolmaster, found drowned in the Thames at Chiswick on December 31, 1888 (apparently dead since early December, three to four weeks after the Kelly murder). Claimed Named in the Macnaghten memorandum, where the suggestion that his family suspected him is given as a reason for police interest. Documentary support is thin; Druitt's known biography (barrister, cricketer, schoolmaster, financial difficulties, apparent suicide) does not directly link him to the East End or to the murders, and Macnaghten's identification of him as a "doctor of about 41" is inaccurate as to his profession and his age. He remains one of the most-cited candidates principally because of his Macnaghten listing.

Francis Tumblety

American quack doctor, arrested in London on November 7, 1888 on charges of gross indecency, jumped bail and fled to the United States in late November. Claimed Identified as a Ripper suspect in a 1913 letter from former Chief Inspector John Littlechild to journalist George R. Sims; the so-called Littlechild letter, discovered by Stewart Evans in the 1990s, has placed Tumblety as a candidate of substantial contemporary police interest. Documentary support: Tumblety was in London during the murders; his subsequent flight is consistent with police suspicion; reports of his anti-female utterances and his collection of anatomical specimens are documented in subsequent American press coverage. Documentary support against: the Kelly murder of November 9 occurred while Tumblety was in custody in London, although he had been released on bail by then. The Tumblety candidacy is regarded by some modern researchers (notably Evans and Paul Gainey, Jack the Ripper: First American Serial Killer, 1995) as the strongest contemporary-police-records candidacy after Kosminski [10].

Walter Sickert

The painter Walter Sickert, then an emerging member of the Camden Town artistic circle and substantially interested in the East End and in the Ripper murders, was named as the killer in Patricia Cornwell's Portrait of a Killer: Jack the Ripper — Case Closed (2002) on the basis of mitochondrial DNA work and the contention that a watermark on one of the Ripper letters matched a watermark on Sickert's personal letterhead. Disputed The Cornwell identification has been criticized by Ripper scholars (notably by Donald Rumbelow, Paul Begg, and Stewart Evans) on multiple grounds: the watermark argument addresses the letters whose authenticity is most contested rather than the canonical murders themselves; Sickert's documented whereabouts during the canonical autumn 1888 period include a substantial portion in France, although the documentation is not airtight; the mitochondrial DNA work is subject to the same haplogroup-population-genetics critique as the Kosminski shawl work. Sickert remains a minority candidate principally because of Cornwell's investment in the case [11].

James Maybrick and the "Maybrick Diary"

Liverpool cotton merchant James Maybrick, who died of arsenic poisoning in May 1889 (his wife Florence was convicted in his murder in a substantially contested trial), was named as the Ripper in a diary that emerged in 1992. Disputed The "Maybrick Diary" was given to literary agent Doreen Montgomery by Michael Barrett, a former Liverpool scrap-metal dealer, in April 1992; Barrett subsequently confessed (and retracted, and re-confessed) that he had forged the diary; subsequent ink, paper, and handwriting analyses have produced inconsistent results. The diary is now generally regarded within the academic Ripperology community as a 20th-century forgery, though a minority of researchers (notably Bruce Robinson, They All Love Jack, 2015) continue to defend its authenticity in some form. The Maybrick candidacy depends substantially on the diary; without the diary, Maybrick has no documented contemporary connection to Whitechapel or to the murders [12].

H.H. Holmes (Herman Webster Mudgett)

American serial killer executed in 1896 for the Pitezel murders in Philadelphia, suspected of additional killings at his Chicago "Murder Castle." Named as the Ripper in Bloodstains (2017) by Holmes's great-great-grandson Jeff Mudgett, on the basis of family papers and a History Channel documentary series. Disputed The Holmes candidacy requires placing Holmes (in 1888 a young pharmacist) in London during the Whitechapel autumn, which family papers and shipping records have been variously argued to support and to refute; the contemporary documentary record does not place Holmes in London at the relevant dates. The candidacy has had press attention principally through the History Channel project rather than through peer-reviewed historical work.

Carl Feigenbaum

German-born seaman executed in New York's Sing Sing in April 1896 for the murder of Juliana Hoffmann in Manhattan. Claimed His defense attorney William Sanford Lawton stated after Feigenbaum's execution that his client had confessed to having a compulsion to kill and mutilate women, and proposed Feigenbaum as the Ripper on the basis of his maritime employment patterns (in port at London during the Ripper autumn). The Feigenbaum candidacy has been re-examined by researcher Trevor Marriott; the documentary support is limited but not negligible. The seaman-with-port-access hypothesis is one of the recurring structural theories of the Ripper case more broadly [13].

The unanswered questions.

The destroyed file material

The Metropolitan Police's Whitechapel Murders file, the City of London Police's Eddowes file, and the Home Office records are all incomplete. Disputed Substantial portions were destroyed in routine paperwork-disposal cycles in the early 20th century; additional material was lost in World War II bombing. The witness statements that survive are a subset of the witness statements taken; the suspect-investigation records are particularly fragmentary. The result is that the documentary basis for any modern suspect-identification is necessarily incomplete and that arguments from absence (e.g., "no record places X near the scene") are weaker than they appear [4][6].

The Anderson witness

Anderson's account of an identification by a witness who refused to testify, corroborated by Swanson's marginalia identifying the suspect as Kosminski and the identification site as the "Seaside Home," is the principal piece of contemporary internal documentation pointing toward Kosminski. Claimed The "Seaside Home" is generally understood as the Convalescent Police Seaside Home in Hove, near Brighton, where Kosminski may have been brought for a witness viewing. The identity of the witness is not securely established; the most-cited candidate is Israel Schwartz, who had given a description of a man harassing Elizabeth Stride shortly before her murder, though Schwartz's specific role in any Kosminski identification is not documented. The chain of reasoning from the Anderson-Swanson contention to a forensic identification of Kosminski is reconstructible but not direct [6][7].

The Goulston Street graffito

Whether the graffito was the killer's or a coincidental piece of antisemitic graffiti, and whether the killer's intention if it was his was to deflect suspicion toward the Jewish community or to express it, is unresolved on the surviving evidence. Disputed The Warren decision to wash the graffito off without photographing it has been variously characterized as defensible (to prevent ethnic violence at a moment of acute East End tension) or as a serious investigative failure (the destruction of a piece of evidence that might have established handwriting comparison with the letters). The two assessments are not exclusive [1][4].

The non-canonical Whitechapel murders

The Whitechapel Murders file contained eleven cases, of which the canonical five are the most-confidently linked. Unverified The other six — including Emma Smith (April 1888), Martha Tabram (August 1888), Rose Mylett (December 1888), Alice McKenzie (July 1889), the "Pinchin Street torso" (September 1889), and Frances Coles (February 1891) — have been variously attributed to the Ripper and to other perpetrators. Whether any of these should be added to the canonical five (most commonly proposed: Tabram, McKenzie), and whether the canonical five themselves are correctly canonical (the Stride attribution is the most often questioned within the canonical five), remains a matter of ongoing debate within the historiography [2][14].

The whole question of whether the case is solvable

Whether the surviving evidence is sufficient, in principle, to identify the killer by a forensic standard equivalent to that applied to modern murder cases is a question with no settled answer. Disputed The most-rigorous academic Ripperology positions (e.g., Paul Begg, Martin Fido, Keith Skinner in their The Complete Jack the Ripper A–Z) hold that the question is, in the strict sense, unanswerable: the documentary record is incomplete, the contemporary forensic-science apparatus was limited, and the standard of proof a 137-year-old case can sustain is substantially lower than the standard of proof a modern conviction requires. The popular literature's enthusiasm for identifying-the-killer claims is a function of public interest, not of the underlying evidentiary state [6][14].

Primary material.

The accessible primary record on the Whitechapel Murders is held at:

• The National Archives at Kew holds the Metropolitan Police file under MEPO 3/140, MEPO 3/141, and MEPO 3/142; the Home Office files under HO 144; and the relevant inquest depositions.
• The London Metropolitan Archives hold the City of London Police records on the Eddowes murder.
• The London Hospital Archives hold records of Dr. Thomas Openshaw's examination of the Lusk kidney.
• The British Newspaper Archive (online via the British Library) holds the contemporary press coverage in the Times, the Pall Mall Gazette, the Illustrated Police News, the Star, and the local East End papers.
• Casebook: Jack the Ripper (casebook.org), maintained by Stephen P. Ryder, is the principal online consolidated archive of primary documents (in transcription) and contemporary press coverage.

Critical individual documents include: the Macnaghten memorandum (Scotland Yard and Aberconway versions, 1894); the Dr. Thomas Bond post-mortem report on Kelly (November 1888); the Dr. Frederick Gordon Brown post-mortem report on Eddowes (October 1888); the Sir Robert Anderson memoir (1910) with the Swanson marginalia (post-1910); the "From Hell" letter and the surviving evidence on the Lusk kidney; and the inquest depositions for the canonical five.

The sequence.

1. April 3, 1888 Emma Smith attacked on Osborn Street; dies April 4. Whitechapel Murders file opened.
2. August 7, 1888 Martha Tabram murdered at George Yard Buildings. Added to the file but not commonly canonical.
3. August 31, 1888 Mary Ann Nichols murdered on Buck's Row. First of the canonical five.
4. September 1, 1888 Sir Robert Anderson becomes Assistant Commissioner CID at Scotland Yard.
5. September 8, 1888 Annie Chapman murdered at 29 Hanbury Street.
6. September 10, 1888 Whitechapel Vigilance Committee formed; chaired by George Lusk.
7. September 27, 1888 "Dear Boss" letter received at Central News Agency.
8. September 30, 1888 Elizabeth Stride murdered at Dutfield's Yard; Catherine Eddowes murdered at Mitre Square. The "double event."
9. September 30, 1888 (post-midnight) Goulston Street graffito and apron fragment found; Sir Charles Warren orders the graffito washed off.
10. October 1, 1888 "Saucy Jacky" postcard received.
11. October 16, 1888 "From Hell" letter and half-kidney delivered to George Lusk.
12. November 7, 1888 Francis Tumblety arrested on indecency charges (not Ripper-related).
13. November 8, 1888 Sir Charles Warren resigns as Commissioner of Metropolitan Police.
14. November 9, 1888 Mary Jane Kelly murdered at 13 Miller's Court.
15. Late November 1888 Tumblety jumps bail and flees to United States.
16. December 31, 1888 Body of Montague John Druitt recovered from the Thames.
17. July 17, 1889 Alice McKenzie murder; included in the Whitechapel file.
18. February 13, 1891 Frances Coles murder; final entry in the Whitechapel Murders file.
19. February 7, 1891 Aaron Kosminski admitted to Colney Hatch Asylum.
20. February 23, 1894 Macnaghten memorandum prepared.
21. 1910 Sir Robert Anderson publishes The Lighter Side of My Official Life; identifies the killer as "a low-class Polish Jew."
22. 1919 Aaron Kosminski dies at Leavesden Asylum.
23. 1981 Swanson marginalia discovered.
24. 2002 Patricia Cornwell publishes Portrait of a Killer: Jack the Ripper — Case Closed.
25. 2014 Russell Edwards and Jari Louhelainen claim shawl DNA identification of Kosminski.
26. 2019 Louhelainen and Miller publish in Journal of Forensic Sciences; methodology critique by Weissensteiner et al. follows.

Cases on this archive that connect.

The Zodiac Killer (File 008) — the most-cited unsolved American serial-killer case, with structural parallels in unsolved status, taunting communications to press, and a long historiographic suspect literature.

The Black Dahlia (File 033) — the 1947 murder of Elizabeth Short in Los Angeles. The Whitechapel and Black Dahlia cases together are the two most-cited unsolved-murder cases of the modern English-language press tradition.

More related files coming as the archive grows. Planned: standalone files on the Cleveland Torso Murders (1935–1938), the Bible John murders (Glasgow, 1968–1969), and the unsolved Spitalfields-area Frances Coles murder of 1891.

Full bibliography.

1. Metropolitan Police file on the Whitechapel Murders, National Archives at Kew, MEPO 3/140, 3/141, 3/142. Inquest depositions and witness statements.
2. Sugden, Philip, The Complete History of Jack the Ripper, Carroll & Graf, 1994; revised 2002. The principal academic narrative reconstruction.
3. Evans, Stewart P. and Skinner, Keith, Jack the Ripper: Letters from Hell, Sutton, 2001. Compiled analysis of the Ripper correspondence including the Dear Boss, Saucy Jacky, and From Hell letters.
4. Begg, Paul; Fido, Martin; and Skinner, Keith, The Jack the Ripper A–Z, John Blake Publishing, multiple editions through 2015. The standard reference compendium on suspects, witnesses, and documents.
5. Openshaw, Thomas, examination of the Lusk kidney, October 1888. London Hospital records.
6. Macnaghten, Melville L., memorandum on the Whitechapel Murders, February 23, 1894 (Scotland Yard version, MEPO 3/141; Aberconway version, Lady Aberconway papers).
7. Anderson, Robert, The Lighter Side of My Official Life, Hodder & Stoughton, 1910; with the Swanson marginalia recovered in 1981.
8. Louhelainen, Jari and Miller, David, "Forensic Investigation of a Shawl Linked to the 'Jack the Ripper' Murders," Journal of Forensic Sciences, Vol. 64, No. 6 (March 2019).
9. Weissensteiner, Hansi and colleagues, methodology critique of the Louhelainen/Miller shawl DNA analysis. Letters to the editor of Journal of Forensic Sciences and subsequent commentary, 2019–2020.
10. Evans, Stewart P. and Gainey, Paul, Jack the Ripper: First American Serial Killer, Kodansha International, 1995. The Tumblety case.
11. Cornwell, Patricia, Portrait of a Killer: Jack the Ripper — Case Closed, Putnam, 2002.
12. Linder, Seth; Morris, Caroline; Skinner, Keith, Ripper Diary: The Inside Story, The History Press, 2003. The Maybrick Diary controversy.
13. Marriott, Trevor, Jack the Ripper: The 21st Century Investigation, John Blake, 2005. The Feigenbaum case.
14. Rumbelow, Donald, The Complete Jack the Ripper, Penguin, multiple editions through 2013. The standard popular narrative treatment.
15. Casebook: Jack the Ripper (casebook.org), curated by Stephen P. Ryder. Consolidated online primary-source archive and contemporary-press transcriptions.