"You may need help, lad," Apollo said, forgetting his anger in his interest at this great adventure Mercury was going to attempt. "Take these," and he gave the young god some very useful presents, a golden divining rod made in a design of two twined serpents, and a pair of wings for his feet and a pair also for his cap.

As Mercury took the golden rod in his hand and fastened on his wings, he suddenly grew very tall and of almost the stature and pattern of the gods. He was their messenger now, and he knew that he had quicker wits and more shrewdness than any of them. He set out at once for the green fields of Arcadia where Io was pastured.

And there was old Argus guarding her with all his hundred eyes. He let the little heifer feed during the day, but when night came he tied a rough rope around her neck. She longed to stretch out her arms and implore freedom of Argus, but she had no arms to stretch and her voice was only a loud bellow that frightened even herself. Her father and her brothers fed her tufts of grass but did not know who she was. No wonder Mercury made haste to come to Io's help, laying aside his wings when he reached Argus and keeping only his wand. On the way he borrowed the pipes of Pan and brought a flock of sheep so that he appeared before Argus as only a wandering shepherd.

Argus listened to the music of the pipes with the greatest delight, for he had never heard them before. He called to Mercury as he strolled along.

"Come and take a seat by me on this stone," he begged. "There is no better grazing ground in all Arcadia than this."

So Mercury sat down beside Argus and played to him as long as he wished, and then he told him stories all the rest of the day until the sun had set and it was starlight and Io still grazed nearby without being tied. As the night wore on and Mercury still soothed Argus with his music and his tales, one by one his hundred eyes closed. At the first streak of dawn, the last eye was shut, and Mercury led Io away to Jupiter to be restored to her proper shape. He did something else too. He gave Juno all of Argus' eyes as a present, which pleased her so much that she put them for ornaments in the tail of her peacock. You may see them there to-day.

So Mercury was safe in the good graces of the gods. They began giving him unusual things to do, such as taking Pandora and her enchanted box down to the earth, carrying new suits of armor to the heroes, and taking off the chains which Mars, the clumsy god of war, had made for his own uses but had become bound with himself. These commissions were little more than fun for Mercury, and they made him feel so important that he began playing tricks again.

Almost all the gods had their own particular treasures which were, in a way, the marks of their authority and power. They grew to depend on these and to feel that they could not carry on their good works without them. And what did that rascal, Mercury, do but take Venus' jewelled girdle, Jupiter's sceptre, Mars' best sword, Vulcan's tongs, and Neptune's trident, and either hide them or try to make use of them himself for a while. Then he would manage to make up in some way for his mischief and smooth the whole matter over. It caused a great deal of anxiety and inconvenience among the gods and at last they sent Mercury down to earth once more to act as a guide to the heroes when they undertook dangerous adventures.