paranoid fear of being fed by other people that drove him to pick up and eat food dropped as litter, and a refusal to wash or bathe. The cause of his insanity was recorded as "self-abuse", which is thought to be a euphemism for masturbation. His poor diet seems to have kept him in an emaciated state for years; his low weight was recorded in the asylum case notes. By February 1919, he weighed just . He died the following month, aged 53. Jack the Ripper suspect Between 1888 and 1891, the deaths of 11 women in or around the Whitechapel district of the East End of London were linked together in a single police investigation known as the "Whitechapel murders". Seven of the victims suffered a slash to the throat, and in four cases the bodies were mutilated after death. Five of the cases, between August and November 1888, show such marked similarities that they are generally agreed to be the work of a single serial killer, known as "Jack the Ripper". Despite an extensive police investigation, the Ripper was never identified and the crimes remained unsolved. Years after the end of the murders, documents were discovered that revealed the suspicions of police officials against a man referred to as "Kosminski". An 1894 memorandum written by Sir Melville Macnaghten, the Assistant Chief Constable of the London Metropolitan Police, names one of the suspects as a Polish Jew called "Kosminski" (without a forename). Macnaghten's memo was discovered in the private papers of his daughter, Lady Aberconway, by television journalist Dan Farson in 1959, and an abridged version from the archives of the Metropolitan Police was released to the public in the 1970s. Macnaghten stated that there were strong reasons for suspecting "Kosminski" because he "had a great hatred of women ... with strong homicidal tendencies". In 1910, Assistant Commissioner Sir Robert Anderson claimed in his memoirs The Lighter Side of My Official Life that the Ripper was a "low-class Polish Jew". Chief Inspector Donald Swanson, who led the Ripper investigation, named the man as "Kosminski" in notes handwritten in the margin of his presentation copy of Anderson's memoirs. He added that "Kosminski" had been watched at his brother's home in Whitechapel by the police, that he was taken with his hands tied behind his back to the workhouse and then to Colney Hatch Asylum, and that he died shortly after.