Desdemona being retired to bed expecting her lord would follow her, soon fell into a slumber, the effect of her troubled spirits, when Othello entered the chamber, full of the black purpose which he had meditated of putting his lady to death. But when he saw her asleep, he thought he would not shed her blood, nor scar that white skin of hers, more white than alabaster. But he was resolved she should die; else (as he said) she would live to betray more men, as she had done him. Then he kissed her for the last time (as he said), and that kiss was so sweet, that he must needs kiss her again: and he wept, but he said they were cruel tears.
Desdemona was awakened with his kisses, and she looked upon Othello, and she saw him gnaw his under lip, and roll his eyes, and she knew he was always fatal when he looked so: and he bade her prepare for death, and to say her prayers, for he would not kill her soul. And this innocent wife, as she lay at his mercy, begged for compassion, and to know her fault, and then he named Cassio, and the handkerchief which (he said) she had given him; and as the guiltless lady was proceeding to clear herself he suddenly would hear no more, but covering her up in the bed-clothes, stifled her till she died.
In this instant of time was brought into the house Cassio, wounded and bleeding, whom Iago had set one of his creatures on to assassinate; but the fellow not succeeding in his attempt to kill Cassio (whom he wounded, but not mortally), and being himself killed by Iago to prevent discovery, in his pockets were found certain letters, which made the guilt of Iago, and the innocence of Cassio, clear beyond all doubt; and Cassio now came to beg pardon of Othello, and to ask wherein he had offended him, that he had employed Iago to murder him.
This discovery was as a thunderstroke to Othello,