The bark of Cinchona trees (from which quinine is obtained) was first described as a remedy for malaria by Jesuit missionaries in Peru. Protestant hostility toward Jesuits, however, led to a distrust of “Peruvian bark” in England. An apothecary’s apprentice named Robert Talbor warned patients to “beware of all palliative cures and especially that known by the name of Jesuits’ powder,” instead offering his own secret remedy. His treatment was highly effective, earning him a fortune.