This document discusses negotiable instruments under sections 4 and 5 of the Negotiable Instruments Act of 1881. It defines a promissory note as a written promise by the maker to pay a certain sum of money to the payee. A bill of exchange requires three parties: a drawer who issues the bill, a drawee who is directed to pay, and a payee who is to be paid. Both promissory notes and bills of exchange must be in writing, contain an unconditional order to pay a certain sum of money, and be signed by the maker or drawer. However, promissory notes involve only two parties while bills of exchange involve three parties and an order for payment from the drawer to the drawe