The Encyclopaedia Medicinae at the Central Library is the repository of a dizzying array of ailments, and Maximo is thrilled to get a peek at the obscure afflictions: An amnesia that causes everyone you've ever met to forget you exist, while you remain painfully aware of your history. A malady that erodes the link between cause and effect: one man commits a murder, another carries the guilt and a third is sentenced for it.