. Describe the argument between Desdemona and Othello at the end of Act III scene iv.

Othello asks for the handkerchief, but Desdemona does not have it. Othello is incensed to hear that Desdemona would give away something so valuable and is persuaded by Iago's insinuations and claims to believe that Desdemona is guilty. Desdemona pleads her innocence, but Othello has been manipulated by Iago. Othello then swears to have Cassio dead, and to be revenged upon Desdemona for the non-existent affair.