unknown murderer had sent numerous messages taunting the police and threatening further murders. This correspondence became one of the enduring legends of the Ripper case. However, the opinions of modern scholars are divided upon which, if any, of the letters should be considered genuine. The "Dear Boss" letter is one of three named most frequently as potentially having been written by the killer, and a number of authors have tried to advance their theories as to the Ripper's identity by comparing handwriting samples of suspects to the writing within the "Dear Boss" letter. Like many documents related to the Ripper case, the "Dear Boss" letter disappeared from the police files shortly after the investigation into the murders had ended. The letter may have been kept as a souvenir by one of the investigating officers. In November 1987, the letter was returned anonymously to the Metropolitan Police, whereupon Scotland Yard recalled all documents relating to the Whitechapel Murders from the Public Record Office, now The National Archives, at Kew. Journalist's confession In 1931, a journalist named Fred Best is reported to have confessed that he and a colleague at The Star newspaper named Tom Bullen had written the "Dear Boss" letter, the "Saucy Jacky" postcard, and other hoax messages purporting to be from the Whitechapel Murderer—whom they together had chosen to name Jack the Ripper—in order to maintain acute public interest in the case and generally maintain high sales of their publication. Calligraphy and linguistic analysis The handwriting of the letter "Dear Boss" was compared to that of the supposed diary of James Maybrick in 1993. The report noted that the "characteristics of the Dear Boss letter follow closely upon the round hand writing style of the time and exhibit a good writing skill." In 2018, a forensic linguist based at the University of Manchester named Andrea Nini stated his conviction that both the "Dear Boss" letter and the "Saucy Jacky" postcard had been written by the same individual. Commenting upon his conclusions, Dr Nini stated: "My conclusion is that there is very strong linguistic evidence that these two [pieces of correspondence] were written by the same person. People in the past had already expressed this tentative conclusion, on the basis of similarity of handwriting, but this had not been established with certainty." Notes References Cited works and further reading External links The "Dear Boss" letter at casebook.org Jack the Ripper