"Second, I’m running a program looking for every Catherine Eddowes in London. It’s not likely to be a common name, so I’m using an analysis frame to search for every one in the public datanets. If we come up with an alternative Catherine Eddowes who’s a seventy-five-year-old retired author up in Wood Green or a five-year-old creche regular, I think we can check them off the list." Geraint paused a moment, unsure how to phrase the next part.