p. 404) considers that Peter was originally a member of the convent of the Akoimetoi, which he places in Bithynia on the Asiatic side of the Bosphorus, at Gomon, "The Great Monastery" and being expelled thence for his behavior and heretical doctrine, passed over to Constantinople, where he courted persons of influence, through whom he was introduced to Zeno, the son-in-law of Leo I (457–474) and future emperor (474–491), whose favor he secured, obtaining through him the chief place in the church of St. Bassa, at Chalcedon.
Here his Non-Chalcedonian beliefs quickly became apparent, resulting with his flight to Zeno, who was then setting out for Antioch as commander of the East (Magister Militum per Orientem).
The deposed Martyrius went to Constantinople to complain to the Emperor Leo, by whom, through the influence of the Patriarch Gennadius, he was courteously received; a council of bishops found in his favor, and his restoration was decreed (Theodorus Lector p. 554).
Leo was naturally indignant at this audacious disregard of his commands, and he despatched an imperial decree for the deposition of Peter and his banishment to the Oasis (Labbe, iv.
Under the influence of his wife, Basiliscus advocated for the Non-Chalcedonians, recalled Timothy Aelurus, Patriarch of Alexandria, from exile, and by his persuasion issued an encyclical letter to the bishops calling them to anathematize the decrees of Chalcedon (Evagr.
On his restoration Peter enforced the addition to the Trisagion, and behaved with great zeal against the Chalcedonian party, crushing all opposition by an appeal to the Syrian people, whom he had gained control over.