 He then began the long verse drama "Prometheus Unbound", a re-writing of the lost play by the ancient Greek poet Aeschylus, which features talking mountains and a petulant spirit who overthrows Jupiter.Tragedy struck, however, first in 1818 when Shelley's infant daughter Clara Everina died during yet another household move, and then in 1819 when his son Will died of fever (most likely malaria) in Rome.A baby girl, Elena Adelaide Shelley, was born on 27 December 1818 in Naples, Italy, and registered there as the daughter of Shelley and a woman named "Marina Padurin".