The Mummy! Egypt; the 1821 public unwrappings of Egyptian mummies in a theatre near Piccadilly, which she may have attended as a girl; and, very likely, the 1818 novel by Mary Shelley, "Frankenstein; or, The Modern Prometheus." As Shelley had written of Frankenstein's creation, "A mummy again endued with animation could not be so hideous as that wretch," which may have triggered young Miss Webb's later concept. In any case, at many points she deals in greater clarity with elements from the earlier book: the loathing for the much-desired object, the immediate arrest for crime and attempt to lie one's way out
Prometheus Bound a human benefactor and divine king-maker, rather than an object of blame for human suffering. There is evidence that "Prometheus Bound" was the first play in a trilogy conventionally called the "Prometheia", but the other two plays, "Prometheus Unbound" and "Prometheus the Fire-Bringer", survive only in fragments. In "Prometheus Unbound", Heracles frees Prometheus from his chains and kills the eagle that had been sent daily to eat the Titan's perpetually regenerating liver. Perhaps foreshadowing his eventual reconciliation with Prometheus, we learn that Zeus has released the other Titans whom he imprisoned at the conclusion of the Titanomachy. In "Prometheus the