John Chrysostom made a lot of enemies very quickly in Constantinople after he became patriarch, especially among the more corrupt clergy and court officials who objected to his campaign for higher standards of behaviour. They quickly arranged for him to be deposed and exiled. But when the Constantinople mob found out, a riot was threatened and he was quickly recalled.
After his return, attempts were made to patch things up, especially with Severian of Gabala who had been insulted pretty seriously by John’s deacons.
I find in Migne three sermons; De Regressu Sancti Joannis (PG52, col. 421), De Recipiendo Severiano (col. 423), and Severian’s reply De Pace (col. 425). All three are given in Latin, and seem far too short to be full versions. I don’t know if there are more sermons than these three.
The full Greek text of Severian’s reply exists, and indeed it turns out to be online. But what about the Chrysostom sermons? Are there Greek versions of these, and if so where?