Note 580 — Chapter LXVII · THE DRAMA. — RHETORIC AND DIALECTICS. — THE SOPHISTS.
Reading edition
Quintilian, Inst. Orat. iii. 4, 10; Aristot. Rhetor. iii, 5. See the passages cited in Preller, Histor. Philos. ch. iv, p. 132, note d, who affirms respecting Protagoras: “alia inani grammaticorum principiorum ostentatione novare conabatur,” which the passages cited do not prove.