The taking of the mares of Diomedes was the eighth labor. These horses were not ordinary horses, living on corn. They were flesh eaters, and moreover, they devoured human beings, and so were hateful to mankind.
On this occasion Hercules was not alone. He organised a hunt and, by the help of a few friends, caught the horses and led them to Eurystheus. The scene of this labor was Thrace, an extensive region lying between the Ægean Sea, the Euxine or Black Sea, and the Danube.
Seizing the girdle of Hippolyte was the next feat set for the hero. This labor was due to the desire of the daughter of Eurystheus for the girdle of Hippolyte, Queen of the Amazons—a tribe of female warriors. It is said that the girls had their right breasts cut off in order that they might use the bow with greater ease in battle! This, indeed, is the meaning of the term Amazon, which signifies "breastless."
After a troublesome journey Hercules arrived safely at the Court of Hippolyte, who received him kindly; and this labor might, perchance, have been a bloodless one had not his old enemy Juno stirred up the female warriors against him.
In the fight that followed, Hercules killed Hippolyte—a feat scarcely to be proud of—and carried off her girdle, and thus the vanity of the daughter of Eurystheus was gratified.
To capture the oxen of Geryon was the tenth labor of Hercules. In the person of Geryon we meet another of those strange beings in which the makers of myths and fairy tales seem to revel. Geryon was a three-bodied monster whose cattle were kept by a giant and a two-headed dog!
It is said that Hercules, on his way to the performance of this tenth labor, formed the Pillars of Hercules—those two rocky steeps that guard the entrance to the Straits of Gibraltar, i.e., Calpa (Gibraltar) and Abyla (Ceuta)—by rending asunder the one mountain these two rocks are said to have formed, although now they are eighteen miles apart.
Hercules slew the giant, the two-headed dog and Geryon himself, and in due course brought the oxen to Eurystheus.
Sometime afterwards, Eurystheus, having heard rumors of a wonderful tree which, in some unknown land, yielded golden apples, was moved with great greed to have some of this remarkable fruit. Hence he commanded Hercules to make the quest of this tree his eleventh labor. The hero had no notion where the tree grew, but he was bound by his bond to obey the King, so he set out and after a time reached the kingdom of Atlas, King of Africa. He had been told that Atlas could give him news of the tree.