The other is termed Petrus Siculus or Peter the Sicilian, and acquired his bishopric after A. D. 790.
He is probably the same person as the Petrus Siculus who was sent by the emperor Basil the Macedonian [BASILIUS I. MACEDO to Tabrica in the district or on the frontier of Melitene near the Euphrates, to negotiate an exchange of prisoners, apparently with the chiefs of the Paulicians ; a purpose which, after a residence of nine months, he effected.
Life of St. Athanasius
Petrus Siculus wrote a life of St. Athanasius, bishop of Methone in the Peloponnesus.
The life of St. Athanasius is given in the Latin version of the jesuit Franciscus Blanditius in the Acta Sanctorum of the Bollandists, Januar. vol. ii. p. 1125, &c.
It is entitled Petri Siculi, humillimi Argivorum Episcopi, Funebris Oratio in B. Athanacsium, Methones Episcopum.
An Account of the Paulicians
He wrote an account of the Paulicians, or as he designated them, Manichaeans.
The account of the Paulicians was translated into Latin, and published by Matthaeus Raderus, 4to. Ingolstadt, 1604
, and has been reprinted in various editions of the Bibliotheca Patrum.
It is entitled Petri Siculi Historia de vane et stolida Manichaeorum Haeresi tanquam Archiepiscopo Bulgarorum nuncupata. It is in the sixteenth volume of the Lyon edition of the Bibliotheca, fol. 1677.
Miraeus, Auctarium de Scriptor. Eccles. 100.256; Vossius, De Historicis Graecis,
lib. 4. c.19; Cave, Hist. Litt.
ad ann. 870, vol. ii. p. 55; Acta Sanctorum, l.c. ;
Fabric. Biblioth. Graec.
vol. x. p. 201; Le Quien, Oriens Christianus,
vol. ii. col. 184.