Younger made astronomical observations, taught mathematics, and wrote lengthy commentaries on the works of Plato and Aristotle. Hypatia was not the last female Neoplatonist philosopher; later ones include Aedesia, Asclepigenia, and Theodora of Emesa. According to Watts, however, Hypatia had no appointed successor, no spouse, and no offspring and her sudden death not only left her legacy unprotected, but also triggered a backlash against her entire ideology. Hypatia, with her tolerance towards Christian students and her willingness to cooperate with Christian leaders, had hoped to establish a precedent that Neoplatonism and Christianity could coexist peacefully and cooperatively. Instead, her death and the subsequent failure by the Christian government to impose justice on her killers destroyed that notion entirely and led future Neoplatonists such as Damascius to consider Christian bishops as "dangerous, jealous figures who were also utterly unphilosophical." Hypatia became seen as a "martyr for philosophy", and her murder led philosophers to adopt attitudes that increasingly emphasized the pagan aspects of their beliefs system and helped create a sense of identity for philosophers as pagan traditionalists set apart from the Christian masses. Thus, while Hypatia's death did not bring an end to Neoplatonist philosophy as a whole, Watts argues that it did bring an end to her particular variety of it. Shortly after Hypatia's murder, a forged anti-Christian letter appeared under her name. Damascius was "anxious to exploit the scandal of Hypatia's death", and attributed responsibility for her murder to Bishop Cyril and his Christian followers. A passage from Damascius's Life of Isidore, preserved in the Suda, concludes that Hypatia's murder was due to Cyril's envy over "her wisdom exceeding all bounds and especially in the things concerning astronomy". Damascius's account of the Christian murder of Hypatia is the sole historical source attributing direct responsibility to Bishop Cyril. At the same time, Damascius was not entirely kind to Hypatia either; he characterizes her as nothing more than a wandering Cynic, and compares her unfavorably with his own teacher Isidore of Alexandria, remarking that "Isidorus greatly outshone Hypatia, not just as a man does over a woman, but in the way a genuine philosopher will over a mere geometer." Middle Ages Hypatia's death was similar to those of Christian martyrs in Alexandria, who had been dragged through the streets during the Decian persecution in 250. Other aspects of Hypatia's life also fit the mold for a Christian martyr, especially her lifelong