An 18th century quack "De Wonderdokter Fop" with Dutch text, illustrated by Hermann van der Moolen. "Zoo was er eens een kind heel ziek; En weet gij, wat ik deed? Ik brak't den nek, waardoor het schaap Geen smart of pijn meer leed." (Once upon a time a child was very sick; And you know what I did? I broke the neck, causing the sheep to suffer no pain or pain.) 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".