An air of mystery and a sense of urgency are created through the key (E minor), quick tempo in 4/4 meter, and swirling melodic patterns of this exciting duet. The secondo sets the stage with a four-measure introduction that features a left-hand bass line that rises and falls while the right-hand figures expand and contract. The primo melody borrows some of the melodic material from the secondo, building an air of suspense. Students who follow the dynamics carefully and keep the tempo moving steadily will create an exciting air of suspense throughout.