For All the Saints - Pious account of the life of St. Porphyrius, who was a monk at Skete and then a hermit before he was made bishop. Also called Porphyry. - http://www.saintpatrickdc.org/ss/0226.htm#porp
Catholic Encyclopedia - St. Porphyrius was bishop of Gaza, and died in 420. - http://www.newadvent.org/cathen/12282c.htm