Dr. Mordecai Bent is a London physician who is interested in poisons. He often consults on cases of his childhood friend Nicholas Brisbane. He is limited in his profession because he is Jewish and often kept form higher paying work. He verifies that a substance brought to him by Brisbane was arsenic, and that determines that Edward was killed by monkswood laced condoms.
Dr. Bent cares for Brisbane when he suffers his attacks. he also becomes Julia’s physician once she dismisses Dr. Griggs.
Dr. Bent agrees to take on Valerius as an apprentice.