From Hell in the alley below. In "The Dance of the Gull Catchers" Moore reports that he had been drawn into and even obsessed with the particulars of the Ripper murders. The Ripperologists—or "Gull Catchers" as he refers to them—are depicted as unhinged men running about with large butterfly nets, chasing details and connections, however tenuous. Initially, Moore observes them from a distance, but eventually—while researching and writing "From Hell"—he joins them. Moore compares the multitude of increasingly outlandish Ripper theories to a Koch snowflake, where a finite, fixed location, event and era (London, in late 1888) can have an infinite number
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