Part I is known as the "Acts of Pilate"; Part II is called "Christ's Descent Into Hell"
Source. Translated by Alexander Walker. From Ante-Nicene Fathers, Vol. 8. Edited by Alexander Roberts, James Donaldson, and A. Cleveland Coxe. (Buffalo, NY: Christian Literature Publishing Co., 1886.) Revised and edited for New Advent by Kevin Knight. <http://www.newadvent.org/fathers/0807.htm>.
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