Note 381 — LECTURE XIX, &c. Of the Drama in general.
Reading edition
Besides, in the ancient Tragedy the Chorus justified Soliloquies, who were supposed to be humane By-standers, where the Scene was laid: Among the Rules given to the Chorus in Horace, one is, that they should keep secret what they heard, Ille tegat commissa, Ar. Poet. ℣ 200.