Treason in the Northern Quarter

In the spring of 1575, Holland's Northern Quarter--the waterlogged peninsula stretching from Amsterdam to the North Sea--was threatened with imminent invasion by the Spanish army. Since the outbreak of the Dutch Revolt a few years earlier, the Spanish had repeatedly failed to expel the rebels under William of Orange from this remote region, and now there were rumors that the war-weary population harbored traitors conspiring to help the Spanish invade. In response, rebel leaders arrested a number