 Whatever its virtues or defects, Wyclif’s theory had some influence on later authors. Robert Alyngton’s own Insolubilia, for instance, from around 1380, explicitly appeals to Wyclif’s theory. Its influence can also be seen in Peter of Mantua’s account (see  Section 4.4  below) and in an anonymous late treatise preserved in a Prague manuscript (see Wyclif [W-SI]: xxiv–xxv.)