An 18th century quack "De Wonderdokter Fop" with Dutch text, illustrated by Hermann van der Moolen. "Een man, die kiespijn had, schoot ik Zijn kies ferm uit den mond; De man had nooit weer kiespijn, en Was nooit weer ongezond." (A man who had toothache, I shot his choice firmly from the mouth; The man never had toothache again, and was never unhealthy again.) Quackery is the promotion of unproven or fraudulent medical practices. Random House Dictionary describes a "quack" as a "fraudulent or ignorant pretender to medical skill" or "a person who pretends, professionally or publicly, to have skill, knowledge, or qualifications he or she does not possess; a charlatan".