Who writes the Oresteia?

"Ah, the time!

For, all at once, a cloud has blanched the blue,

A cold wind creeps through the close vineyard-rank,

The olive-leaves curl, violets crisp and close

Like a nymph's wrinkling at the bath's first splash

On breast. (Your pardon!) There 's a restless change,

Deterioration. Larks and nightingales

Are silenced, here and there a gor-crow grim

Flaps past, as scenting opportunity.