- A particular church father (e.g. all Tertullian's works)
- A particular Church Father's Work (e.g. Tertullians "The Five Books Against Marcion")
For example, I'm looking for mentions of John in any of Tertullian's works, then specifically in "The Five Books Against Marcion".
I find myself repeatedly running into this situation. More often, wanting to search within a particular Father's works (e.g. Where did Irenaeus mention Isaiah? Where did Clement of Alexandria mention Plato?)