Pseudo-Plutarchus
Several works in the Plutarchan corpus were recognised in antiquity as not being by Plutarch himself. De Musica (On Music) preserves invaluable information about the history and theory of Greek music, drawing on lost works by Aristoxenus and others. The Placita Philosophorum (Doctrines of the Philosophers), sometimes attributed to Aetius, is a doxographical handbook summarising the views of Greek philosophers on cosmological, meteorological, and psychological topics. Both are valuable for preserving the positions of thinkers whose own works are lost.
A doxographical work summarising the opinions of philosophers on natural philosophy, cosmology, and psychology. Not by Plutarch but preserving materia...