 " Ode to a Nightingale " was probably the first of the middle set of four odes that Keats wrote following " Ode to Psyche " , according to Brown . There is further evidence of this in the structure of the poems because Keats combines two different types of lyrical poetry in an experimental way : the <unk> hymn and the lyric of questioning voice that responds to the <unk> hymn . This combination of structures is similar to that in " Ode on a Grecian Urn " . In both poems the dual form creates a sort of dramatic element within the poem . The stanza forms of the poem is a combination of elements from <unk> <unk> and Shakespearean <unk> . 
