Ante-Nicene Fathers Volume VI
Peter of Alexandria: The Canonical Epistle with the Commentaries of Theodore Balsamon and John Zonaras.
This piece is interesting not so much for it's content (which is fine, even if it doesn't really stand out) as it is as a model of how the Medievals approached the Ancients. That is, the interplay between the original text and the Medieval commentators is interesting to observe and reflect on. While we modern Protestants tend to stick to expositing Scripture rather than other expositors, it's still worth thinking about whether we ought to more directly engage those whose writings we appreciate and learn from.