From Hell letter claiming to be from the killer were posted at the time of the Ripper murders, but many researchers argue that the "From Hell" letter is one of a handful of possibly authentic writings received from the murderer. Its author did not sign it with the "Jack the Ripper" pseudonym, distinguishing it from the earlier "Dear Boss" letter and "Saucy Jacky" postcard, as well as their many imitators. The handwriting is also similar in the earlier two messages but dissimilar in the one "From Hell". The letter was delivered to Lusk personally without reference to the police or to the British
From Hell letter the Whitechapel Vigilance Committee. It was accompanied by a preserved section of a human kidney; the letter's writer claimed to have eaten the other half. The police received a large number of letters claiming to be from the murderer, at one point having to deal with an estimated 1,000 letters related to the case, but the "From Hell" message is one of the few that has received serious attention as possibly being genuine. Opinions on the matter have remained divided. Several fictional works have referred to the Lusk letter, an example being the thriller novel "Dust and Shadow". The letter