Which pair identifies the original parties to an ordinary promissory note before any indorsement?

Under section 4 of the Negotiable Instruments Act, 1881 a promissory note is an unconditional undertaking by its maker to pay a certain sum to a certain person, the payee, or to his order or to bearer; section 7 names the maker. Drawer, drawee and acceptor are parties to a bill of exchange, which contains an order rather than a promise.