in the study at Chiswick Manor, was an aletheia crystal, a faceted stone, enchanted to preserve a person’s memories. Grace would have thought that families would use such magic to record joyful events, but this one contained a short, grisly scene in which one Annabel Blackthorn, who had lived a hundred years ago, was tortured by the Inquisitor for consorting with a Downworlder and sentenced to be exiled to the Adamant Citadel.