So, when the moon was next in the full, Medea made her way silently and alone out of the palace when it was the dead of night and all creatures slept. She moved swiftly along the fields and groves murmuring strange words as she went, and addressing an incantation to the moon and to the stars. There was a goddess, named Hecate, who was supposed to represent the darkness and terror of the night as Diana represented its beauties. At dusk she began her wandering over the earth, seen only by dogs who howled at her approach. Medea followed Hecate, imploring her help, and she also called to Tellus, that goddess of the earth by whose power those herbs that could be brewed for enchantment were grown. And Medea invoked the aid also of the gods of the woods and caverns, of valleys and mountains, of rivers and lakes, and of the winds and vapors.

As Medea took her enchanted way through the night, the stars shone with an unusual brilliancy and presently a chariot, drawn by flying serpents descended to meet her through the air. Medea ascended in it and made her way to distant regions where the most powerful plants grew and brought them back before the day's first light for her uses. Nine nights Medea rode away in the chariot of the flying serpents, and in all that time she did not go within the doors of her palace or shelter herself under any roof, or speak to a human being.

Hebe was the goddess of youth and one of the cup bearers of the gods. When Medea had gathered the herbs which she needed for her potion, she built a fire in front of a nearby temple to Hebe and over the fire she hung a very wide and deep caldron. In this caldron she mixed the herbs with seeds and flowers that gave out a bitter juice, stones from the far distant east, and sands from the encircling shore of the ocean. There were other ingredients, also, in this brew; a screech owl's head and wings, hoar frost gathered by moonlight, fragments of the shells of tortoises who of all creatures are the most long lived, and the head and beak of a crow, the birds that outlives nine generations of men.

Medea boiled all these ingredients together to get them ready for the deed she proposed to do, stirring them with a dried branch from an olive tree. And, strange to say, the branch did not burn, but when the sorceress lifted it out it instantly turned as green as it had been in the spring, and in a short time it was covered with leaves and a luxuriant growth of olives. The potion in the caldron bubbled and simmered and sometimes rose so high as it boiled that it spilled over the edge and down on the ground. But wherever the drops touched the earth, new green grass shot up and there were flowers as bright and fragrant as the most prized blossoms of the May.

The sorceress wished to further test her brew, though, and she put an old sheep, one of the most ancient of the flock, in the seething potion. Instead of being cooked, the creature was quite unhurt and when Medea removed the cover, a little new lamb, soft and white, jumped out and ran frisking away to the meadow.

So Medea knew that her spell was ready and she commanded that Jason bring his aged father, Aeson, to her.

"I would like to know him," she explained, "and hear from his lips of the deeds you did in your youth."

Then Jason, all unsuspecting, sent for his father and conducted him to the spot near the temple of Hebe where Medea waited. And as soon as she saw Aeson, Medea threw him into a deep sleep by means of a charm and placed him on a bed of herbs where he lay with no apparent breath or life in him.

"Wicked sorceress, you have killed my father whom I so greatly loved," Jason cried.

Then, even as he spoke, Medea advanced toward the old man and wounded him deeply, so that all his blood poured out. After this she dipped into her caldron and poured the charmed brew into Aeson's mouth and bathed his wound with it.