The Furies

The Furies are perhaps the most terrifying spectres of the ancient world. They are three sisters whose purpose in the world is purely vengeance. They were called the Dirae, the Furies, by the Ancient Greeks. They were called the Erinyes. But they were also called the Eumenides which means "The Kindly Ones."

"Not even the sun will transgress his orbit but the Erinyes, the ministers of justice, overtake him."

http://www.bartleby.com/8/3/
The Furies by Aeschylus

http://www.geocities.com/Athens/Parthenon/6542/furies.html
http://classics.mit.edu/Aeschylus/eumendides.html
Eumenides By Aeschylus

http://www.temple.edu/classics/furies.html

http://www.theatrehistory.com/ancient/bates021d.html

http://www.thanasis.com/modern/furies.htm

http://www.megaera.org/Megaera/fury.html

In Roman mythology, the Furies also known as the Dirae (The Terrible) (Erinyes or Erinnyes (The Angry Ones) in Greek mythology) are three sisters: Alecto (The Unceasing or The Endless who was their leader), Megaera (The Grudging or The Envious Rager) and Tisiphone (The Avenging or The Retaliator). There are two accounts of their creation. One account has it that they came into being when the blood produced by Cronus castrating his father Uranus splashed upon the Earth, Gæa. The other account has it that they were mothered by Gæa with air and bad human emotions and deeds such as murder, perjury, disrespect, ingratitude, harshness, and violation of filial piety and the laws of hospitality.

 http://www.uh.edu/~cldue/texts/eumenides.html

http://www.olympian-foundation.org/eumenides.htm

http://www.sacred-texts.com/cla/aesch/eumend.htm