The Macnaghten Memoranda
The official notes written by Sir Melville Macnaghten in 1894 in response to a published remark in The Sun referring to a man named Thomas Cutbush and his possible connections to the Ripper slayings. It delves more into the Ripper case itself than it does into Cutbush, and is one of the most quoted documents in Ripper investigations. These were sent to Scotland Yard as an official report, and a slightly edited version is available in the Public Record Office.
A letter written from Sir Charles Warren on 6 November 1888 in which Warren defends his decision to erase the Goulston Street Graffito -- an action which caused much uproar and ultimately contributed to his resignation.
The letter recently discovered by Evans and Gainey which has prompted the possibility that Francis Tumblety was Scotland Yard's number one suspect and possibly the Ripper. The letter was sent to G. R. Sims from Chief Inspector John Littlechild on September 23rd, 1913. It was rediscovered by Stewart Evans in 1993.
This post-mortem report was written by Dr. Thomas Bond after he examined the remains of Mary Jane Kelly. The report was lost until 1987, when it was returned anonymously to Scotland Yard.
Inquest proceedings for the Tabram, Nichols, Chapman, Stride, Eddowes and Kelly murders. Though most of the original inquest records have been lost, the contemporary newspaper coverage by The Daily Telegraph and The Times (London) was in-depth and very detailed.
Debates held in Parliament during, after, and concerning the Whitechapel Murders.
Letters written by Jack the Ripper suspect James Kelly, transcribed by Ryan J. Miller