“ He was one of the most favourable examples of the Roman “grammatici” and the most learned man of his time. He is chiefly known for his commentary on Virgil, which has come down to us in two distinct forms. The first is a comparatively short commentary, definitely attributed to Servius in the superscription in the MSS. and by other evidence. A second class of MSS. (all going back to the 10th or 11th century) presents a much expanded commentary, in which the first is embedded ”