958. There are bands of spirits wandering about whom other spirits absolutely dread. They concentrate on the lower part of the back, causing agony by rapid movements to and fro which none can prevent and which are audible; and they direct their tightening and releasing action upwards in the shape of a cone with the point on top. Whoever is put inside this cone, especially near its apex, is wrenched apart pitiably in every single part of his limbs. Those who are put inside it and punished in this manner are deceitful pretenders.