The Ripper's first victim Mary Ann Nicholls, the Ripper’s first victim, is murdered in Buck’s Row, Whitechapel.

Second victim Annie Chapman, the second victim, is murdered in the back yard of 29, Hanbury Street.

"Double event" murders The so-called “double event” of two Ripper murders on one night. The body of Elizabeth Stride is found in the early hours in Dutfield’s Yard, Berners Street, now known as Henriques Street. Within an hour, the fourth victim Catherine Eddowes is slain in Mitre Square.

"Dear Boss" letter On the same day a news agency received a message - known as the “Dear Boss” letter – which is thought by some to have been by the killer himself.

Ripper on the move? The Liverpool Echo revealed it had received a letter claiming that the Ripper was about to strike in Dublin. The following day, it reported on a second letter which refuted the first claiming instead the “Whitechapel purger” was going to New York.

A fifth gruesome discovery Mary Jane Kelly, which according to a new book was the pseudonym of Elizabeth Weston Davies, was found horribly mutilated in her room in a Whitechapel slum.

Ripper fiction Marie Belloc Lowndes publishes The Lodger, a novel based on the Ripper murders. Adapted for the screen five times - firstly as an early silent move by Alfred Hitchcock – it helps secure the Ripper’s enduring place in popular fiction.

Chief suspect revealed Author Tom Cullen reveals that Sir Melville Macnaghten of Scotland Yard regarded Montague John Druitt as the chief suspect.

Another book, another suspect Another book, by Donald Bell, sets out evidence for Neill Cream being the Ripper.

Seminal Ripper research Key text The Complete Jack the Ripper by Donald Rumbelow is published.

Detective notes revealed The Daily Telegraph reveals for the first time contents of notes by Chief Insp Donald Swanson, a Ripper detective, naming Aaron Kosminski as the Ripper.

Crime novelist wades in Theory published by Jean Overton Fuller that renowned artist Walter Sickert was the killer. Patricia Cornwell, the crime novelist, later spends millions of pounds attempting to prove Sickert’s guilt.

New suspect emerges Authors Stewart Evans and Paul Gainey reveal Frances Tumblety as a major suspect after discovering a 1913 letter from a Special Branch officer in an antiquarian bookshop.

Police informants are protected Scotland Yard wins a legal battle to keep secret four thick ledgers containing details of police informants from the Victorian era, including some who provided tip-offs relating to the Ripper. Police argue informants’ names must remain secret forever.

Forensic hopes are dashed Russell Edwards claims to have solved the Ripper mystery – and proved Kosminski’s guilt - through DNA analysis of a shawl belonging to Catherine Eddowes, but the forensic techniques used are later undermined.