Two courses of action, it was argued, were required. First, crypto-Judaism could only be overcome by the introduction of an Inquisition; second, Jewish influence over the conversos could only be overcome by their expulsion. These ideas, adumbrated in works such as Alonso de Espina's Fortalitium Fidei, continued to gain ground, and on 27 September 1480 the Catholic Monarchs appointed Inquisitors in Castile who began their work in Seville shortly after (1481). Conversos, often subjected to torture…