a deacon. Maximus, abbot of Chrysopolis (A.D. 662), mentions, in a letter to a nobleman named Petrus, a treatise on the union and distinction of two natures in Jesus Christ, which he had addressed to Cosmas. Cosmas had been attracted by Severian opinions, but had returned to the Catholic Church. In a second letter to Cosmas, Maximus professes his sorrow at the calumnies spread abroad against Gregory, praefect of Africa (Migne, Patrol. Graec. 91; Maximus, 307-309, 313, 334; Ceillier, 11:768, 769).