4,5, 6 or 7?
ROFL Does it matter to you? I showed you that indeed it was at the Council of Ephesus. The issue with Nesterius was dispensed with when he was removed and replaced and other issues were dealt with in that last several sessions. Look up the Formula of union between Cyrill and John of Antioch or the Letter of Cyril to John of Antioch about peace. The later might be of special interest to you.