Syriaca.org URI: http://syriaca.org/person/2725
Severus wrote a letter to Caesaria Hypatissa discussing a hagiographic story about Nisthora predicting that an emperor would not have a son while the Council of Chalcedon remained in force. See factoid page
The monk Nisthora died but came back to life to inform the messenger of Theodosius II that he would not have a son because the empire was about to become "Nestorian," i.e. Chalcedonian. See factoid page