Letter 92 [inc. "Quid de dilectionis"]
Leo the Great informs Bishop Julian of Cos about the forthcoming council convoked by the Emperor (the Council of Chalcedon). He says that Julian has a better knowledge of the affairs in the East than the legates dispatched from the West - Bishops Paschasinus, Lucentius, and the Presbyters Basil and Boniface. Leo the Great asks then Julian to help his legates and join them as the papal representative. The letter is given on the 6th day before the Kalends of July in the consulship of Adelfius [=26 July 451].
(Patrologia Latina 54, 936 = Ballerini 1753: 1066-1067)