Milton's concept of Hades apparently does not include the happy Persephone, who ruled 1/3 of the year with her husband Hades (Pluto). The few Greek heroes who were able to descend into Hades found Persephone quite satisfied with her life there, her husband and her role as queen. She may even have chosen to eat pomegranates in order to stay there part of the year and not return to her mother!