Police at the Funeral tea. Campion heads to the house and meets the famous Caroline Faraday, who hires him to help them resolve matters. Oates analyses the teacup and finds traces of conium poison (hemlock, the poison that was used to execute Socrates, and one of the species in the carrot genus, including dill, and parsnip), while Campion finds a stash of weight-loss pills in Julia's room. Uncle William approaches Marcus, telling him he has been suffering from blackouts, and Campion also finds the old man's service revolver is missing, along with some cord from the same (unused) room. Later, Campion finds William in
Poison drilling rigs). Plant-based contact irritants, such as that possessed by poison ivy or poison oak, are often classed as allergens rather than poisons; the effect of an allergen being not a poison as such, but to turn the body's natural defenses against itself. Poison can also enter the body through the teeth (in the controversial case of dental malpractice), faulty medical implants, or by injection (which is the basis of lethal injection in the context of capital punishment). In 2013, 3.3 million cases of unintentional human poisonings occurred. This resulted in 98,000 deaths worldwide, down from 120,000 deaths in 1990.