The "From Hell" letter (also known as the "Lusk letter") was a letter sent alongside half of a preserved human kidney to the chairman of the Whitechapel Vigilance Committee, George Lusk, in October 1888. The author of this letter claimed to be the unidentified serial killer known as Jack the Ripper, who had murdered and mutilated at least four women in the Whitechapel and Spitalfields districts of London in the two months prior to Lusk receiving this letter, and whose vigilance committee Lusk led in community efforts to assist police in efforts to identify and apprehend the perpetrator.The letter was postmarked on 15 October 1888 and was received by Lusk the following day. An examination of the kidney revealed the individual from whom the organ originated had suffered from Bright's disease. The author of this letter claimed to have fried and eaten the other half.Police, press, and public alike received many letters claiming to be from the Whitechapel Murderer, with investigators at one stage having to deal with an estimated 1,000 letters related to the case. However, the "From Hell" letter is one of the few articles of correspondence that has received serious consideration as to actually being genuine. Nonetheless, opinions remain divided with regards to the letter's authenticity.The murders committed by Jack the Ripper have attracted much attention in popular culture for decades, with several factual and fictional works directly making reference to the "From Hell" letter.