Bianca (Othello) request. Midway through 4.1., and prior to Bianca's entrance, Othello has been secretly observing a bawdy discussion between Iago and Cassio about the latter's sexual exploits with a young woman. Thanks to Iago's impeccable planning (and some bad luck), neither speaker mentions the name of the woman in question; it is in fact Bianca, but Othello tragically assumes it to be his wife, Desdemona. Bianca suddenly enters, and her suspicions of Cassio are even greater than before. She is convinced that the handkerchief belongs to another woman, and throws it contemptuously at Cassio's feet. In Othello's eyes, her apparent jealousy
Othello is the model for Shakespeare's Othello, but some researchers believe the poet also took inspiration from the several Moorish delegations from Morocco to Elizabethan England "circa" 1600. Another possible source was the "Description of Africa" by Leo Africanus. The book was an enormous success in Europe, and was translated into many other languages, remaining a definitive reference work for decades (and to some degree, centuries) afterwards. An English translation by John Pory appeared in 1600 under the title "A Geographical Historie of Africa, Written in Arabicke and Italian by Iohn Leo a More..." in which form Shakespeare may have seen