induced to accept the communion of the Chalcedonians, and on his return ratified the union at a synod at Theodosiopolis, but without formally recognising the Synod of Chalcedon. In 632, on the death of the patriarch George, Cyrus was appointed to the see of Alexandria and immediately opened negotiations with the chief Monophysite party in the city, the Theodosians. With these a union was effected by means of nine articles, in which the doctrine of two natures was asserted with a qualification, and one theandric operation maintained, while there was no acceptance of the Synod of Chalcedon or anathema against the Monophysite leaders (3 June 633).
At this point opposition arose. Sophronius, a Palestinian monk, who was then in Alexandria, entreated Cyrus not to make public proclamation of the articles; whereupon Cyrus referred him to Sergius to whom he gave him a letter. As Sergius was unable to convince Sophronius, who was a man of great influence, the attempt at union seemed likely to cause a new schism: accordingly he agreed to a compromise by which both expressions "one operation" and "two operations" were to be avoided; and Sophronius with a letter of explanation from Sergius returned to Jerusalem, where early in 634 he was chosen patriarch. Sergius meanwhile wrote to Cyrus in the sense of the compromise; but Cyrus, not wishing to undo his own work, did not immediately accept it. Receiving a request from Heraclius at Edessa to send the quotations in support of the doctrine of one operation and one will contained in the letter of Menas, Sergius did so, but suggested that the controversy should cease. He then wrote an account of the affair to Pope Honorius, proposing that both expressions "one operation" and "two operations" should be rejected as stumbling-blocks, but specially reprobating the latter as implying the doctrine of two wills, which he condemned as impious. In answer to this Honorius concurred in the banishment of both expressions, and maintained the doctrine of one will, the advocates of which are generally known as Monotheletes. Sophronius now sent his synodical letter to the patriarchs, in which in accordance with the compact he avoided the expression "two operations," but strongly asserted the doctrine implied in it. This letter Sergius ignored: but Honorius wrote to Sophronius begging him to let the dispute drop; and the messengers of Sophronius said that he would do so if Cyrus would do the same. To him therefore the pope also sent a request to cease preaching one operation. Sophronius however sent bishop Stephen of Dora to Rome to try to bring the pope round to his side; but the capture of Jerusalem (637) and his own death, which soon followed, prevented any further action on his part, while in Egypt the abandonment of the doctrine on which the union was built destroyed the union itself, and the violent measures used by Cyrus to enforce conformity made matters worse than before.
The next step on the part of Sergius was to compose the Ekthesis,
