Page:Nestorius and his place in the history of Christian doctrine.djvu/51

Rh the question arises as to when the "supplement-letter," so to speak, was written, and this question must be answered by the assertion that it was earlier than the letter to the agents as the conclusion of which it is found in the Greek manuscripts. For in the supplement-letter, Cyril, even writing to his own agents, is not yet sure whether he shall call Nestorius a brother or not, and he will not yet give Nestorius cause for the reproach that his agents denounced him as a heretic. The supplement-letter is written, therefore, at least as early as the first letter of Cyril to Nestorius, dating from about late summer 429. Nestorius in his Treatise of Heraclides seems to regard it as still earlier, for his