For kivrin, preparing an on-site study of one of the deadliest eras In Humanity's history was as simple as receiving inoculations against the diseases of the fourteenth century and inventing an alibi for a woman travelin...For kivrin, preparing an on-site study of one of the deadliest eras In Humanity's history was as simple as receiving inoculations against the diseases of the fourteenth century and inventing an alibi for a woman traveling alone.