Nor law nor duty bade me fight, Nor public men, nor cheering crowds. A lonely impulse of delight Drove to this tumult in the clouds.
8 is WRONG.
You maybe could hear a dactyl at the start of line 4: "DROVE to this | TUM ult in |..." but even there it soon breaks down, and there are no dactyls elsewhere. Also, the serious thoughtful tone would sort ill with a triple rhythm like dactyls.