Likewise, pennyroyal was known even to the ancient Greeks as a form of birth control; “Harts-horn,” or century plant, was also commonly recommended at the time as part of concoctions for abortions and expelling afterbirth. The entry concludes by advising that the patients “shou’d be cautious of taking Opiates too often, or Jesuits-Bark”—a remedy for malaria sometimes mistakenly thought to be an abortifacient—and just in case anyone was not clear on what caused this malady, “nor must they long for pretty Fellows, or any other Trash whatsoever.” So: avoid sex.