To the right is a map of the White Chapel neighborhood in London, with victims' names and the places they died pinned in red. If you're interested, aficionado Richard Jones maintains an interesting site with tons of information about the murders. Here's a link.
All of the descriptions about the murders in Risking Eternity are taken verbatim from newspaper accounts, interviews and transcripts from 1888. Though of course I put my own spin on it. . .