Note 19 — ACT III.
Reading edition
{63}["In the third act, when Sardanapalus calls for a mirror to look at himself in his armour, recollect to quote the Latin passage from Juvenal upon Otho (a similar character, who did the same thing: Gifford will help you to it). The trait is, perhaps, too familiar, but it is historical (of Otho, at least), and natural in an effeminate character."—Letter to Murray, May 30, 1821, Letters, 1901, v. 301. The quotation was not made in the first edition, 1821, nor in any subsequent issue, till 1832. It is from Juvenal, Sat. ii. lines 199-203—
"Ille tenet speculum, pathici gestamen Othonis, Actoris Aurunci spolium, quo se ille videbat Armatum, cum jam tolli vexilla juberet. Res memoranda novis annalibus, atque recenti Historia, speculum civilis sarcina belli." "This grasps a mirror—pathic Otho's boast (Auruncan Actor's spoil), where, while his host, With shouts, the signal of the fight required, He viewed his mailed form; viewed, and admired! Lo, a new subject for the historic page, A mirror, midst the arms of civil rage!"
Gifford.]