In this excerpt, Mossman discusses the imagery in Prometheus Bound, illustrating the large role it plays in relating the drama.

Very little to do with the exact context of Prometheus Bound can be proved, because of the poor state of the evidence, but several scholars, most recently Griffith, have argued convincingly that there was a trilogy by someone consisting of Prometheus Firebearer (Pyrphoros), Prometheus Bound, and Prometheus Unbound in that order, and in what follows it is assumed that that was the case. There are some fragments which suggest that images familiar from Prometheus Bound appeared in the other two plays as well; to these I shall return, but first the imagery within the play we actually have should be considered in some detail.

The major interest of Prometheus Bound is the characterization of the relationship between Zeus and Prometheus, and the tracing of Prometheus' emotional movement...