Quintilian, Institutio Oratoria, Vol. IV (Loeb)

SIGLA Abbreviations representing specific manuscripts

A = Codex Ambrosianus, 11th century.
B = Agreement of the Codices Bernensis, Bambergensis, and Nostradamensis, 10th century.
G = Codex Bambergensis, specifically those passages where gaps have been supplied by a later 11th-century hand.