structural:expansion, information:classification
Manuscripts of Terence

The manuscripts of Terence can be divided into two main groups. One group has just one representative, the Codex Bembinus (known as A), dating to the 4th or early 5th century AD, and kept in the Vatican library. This book, written in rustic capitals, is one of the earliest surviving manuscripts of any Latin writer. It has the plays in the order An., Eu., Hau., Ph., Hec., Ad. Three small fragments of similar antiquity survive as well.

Approximately 650 manuscripts exist of later date. These are often known as the "Calliopian" manuscripts, based on subscriptions to the plays found in several of the earlier manuscripts indicating the text had been corrected by someone named Calliopius; nothing further is known of this individual. They date from the 9th century onwards and are written in minuscule letters. This group can be subdivided into three classes. The first class, known as γ (gamma), dates to the 9th, 10th, and 11th centuries and includes manuscripts P (Parisinus), C (Vaticanus), and possibly F (Ambrosianus), and E (Riccardianus) among others. They have the plays in the order An., Eu., Hau., Ad., Hec., Ph.. Manuscript C is the famous Codex Vaticanus Latinus 3868, which has illustrations which seem to be copied from originals dating in style to the mid-third century.

Another group, known as δ (delta), has the plays in alphabetical order: An., Ad., Eu., Ph. (=F), Hau., Hec. This consists of 3 or 4 10th-century manuscripts: D (Victorianus), G (Decurtatus), p (Parisinus), and perhaps also L (Lipsiensis).

All the remaining manuscripts belong to the "mixed" group and contain readings copied from both γ and δ, and so are of little value in establishing the text.

It is thought that the γ group and the δ group go back to two archetypes, both now lost, called Γ (Gamma) and Δ (Delta), and that both of these were copied from a single archetype, also now lost, known as Σ (sigma). According to A. J. Brothers, manuscript A, although it contains some errors, generally has a better text than Σ, which has a number of changes designed perhaps to make Terence easier to read in schools. Both A and the now lost Σ are believed to be derived from an even earlier archetype known as Φ (phi), the date of which is unknown.

In addition to these manuscripts there are also certain commentaries, glossaries, and quotations in ancient writers and grammarians which sometimes assist editors in establishing the original reading. The best known of these is the Commentum Terenti, a commentary by the 4th-century grammarian Aelius Donatus, which is often helpful, although the part dealing with the Heauton Timorumenos is missing.