4 surviving letters between Libanius and Photius, correspondent of Libanius, spanning 388-390 AD.
Libanius writes to Photius about Eusebius's visit, praising Photius's character.
Libanius asks Photius to send a more lenient letter to Romulus.
Libanius asks Photius to continue helping the sophist Eusebius and promises public praise in return.
Libanius again asks Photius for a favor, this time for Argyrius.