The last-named having gone, and the Moor having asked for poison with which to kill Desdemona, Iago counsels that Othello strangle her in bed that night, while he goes forth and slays Cassio. For this counsel Othello makes Iago his lieutenant.
The Venetian ambassadors arrive. There follows the scene in which the recall of Othello to Venice and the appointment of Cassio as Governor of Cyprus are announced. This is the scene in which, also, the Moor strikes down Desdemona in the presence of the ambassadors, and she begs for mercy—"A terra—sì—nel livido fango" (Yea, prostrate here, I lie in the dust); and "Quel sol sereno e vivido che allieta il cielo e il mare" (The sun who from his cloudless sky illumes the heavens and sea).
[[Listen]]
Quel Sol sereno e vivido che allieta il cielo e il mare
After this there is a dramatic sextet.
All leave, save the Moor and his newly created lieutenant. Overcome by rage, Othello falls in a swoon. The people, believing that the Moor, upon his return to Venice, is to receive new honours from the republic, shout from outside, "Hail, Othello! Hail to the lion of Venice!"
"There lies the lion!" is Iago's comment of malignant triumph and contempt, as the curtain falls.
Act IV. The scene is Desdemona's bedchamber. There is an orchestral introduction of much beauty. Then, as in the play, with which I am supposing the reader to be at least fairly familiar, comes the brief dialogue between Desdemona and Emilia. Desdemona sings the pathetic little willow song, said to be a genuine Italian folk tune handed down through many centuries.