Augustine reminds the people of Memblibanum that they have asked for the ordination of Gitta. Gitta was a deacon before and was accused of a sexual misbehaviour by a certain woman (this is very probably an affair mentioned in Letter 13*, ). Augustine is not sure if all the accusations are true, but he says that even the things confessed by Gitta himself are enough to expel him from the ranks of clergy, which Augustine did. He mentions also that all Christians, but especially clerics, should abstain not only from illicit sexual intercourses, but from everything that may endanger chastity.
The letter is carried by presbyter Restitutus whose presence should in some way "console" the citizens of Memblibanum.
It seems that both Memblibanum and Unapompei belong to the diocese of Hippo; otherwise it would be difficult to understand the right of Augustine to demote Gitta.