To the first six books Gregory subsequently added chapters on the bishops Salonius and Sagittarius, and on his quarrels with Felix of Nantes.
To Eucherius's two sons, Salonius and Veranus, he acted as tutor in consort with Vincent of Lerins.
Salvian continued his friendly intercourse with both father and sons long after the latter had left his care; it was to Salonius (then a bishop) that he wrote his explanatory letter just after the publication of his treatise Ad ecclesiam; and to the same prelate a few years later he dedicated his great work, the De gubernatione Dei.
.Salvian published it under the name of Timothy, and explained his motives for so doing in a letter to his old pupil, Bishop Salonius (Ep. ix.).