Love
Love is a common theme in many novels, as well as plays, in this case. Since it drives the point of the story across so well, it becomes a theme in itself, showing how no one will stop for the great emotion. We see in the play that both Horace and Agnes are prevented from seeing each other, and both are extremely saddened because of what? - Love. Love becomes a driving force in the novel and could go as far as being considered a character, as it is the superior entity that empowers both Horace and Agnes to reach their goals.