Polly, Annie, Elizabeth, Catherine and Mary-Jane are famous for the same thing, though they never met. They came from Fleet Street, Knightsbridge, Wolverhampton, Sweden and Wales. They wrote ballads, ran coffee houses, lived on country estates, they breathed ink-dust from printing presses and escaped people-traffickers. What they had in common was the year of their murders: 1888. The person responsible was never identified, but the character created...