Long, long ago, when this old world was in its tender infancy, there was a child, named Epimetheus, who never had either father or mother; and that he might not be lonely, another child, fatherless and motherless like himself, was sent from a far country to live with him, and be his playfellow and helpmate. Her name was Pandora.

The first thing that Pandora saw, when she entered the cottage where Epimetheus dwelt, was a great box. And almost the first question which she put to him, after crossing the threshold, was this: "Epimetheus, what have you in that box?"

"My dear little Pandora," answered Epimetheus, "that is a secret, and you must be kind enough not to ask any questions about it. The box was left here to be kept safely, and I do not myself know what it contains."

"But who gave it to you?" asked Pandora. "And where did it come from?"

"That is a secret, too," replied Epimetheus.

"How provoking!" exclaimed Pandora, pouting her lip. "I wish the great ugly box were out of the way!"

"Oh, come, don't think of it any more!" cried Epimetheus. "Let us run out of doors, and have some nice play with the other children."

It is thousands of years since Epimetheus and Pandora were alive; and the world, nowadays, is a very different sort of thing from what it was in their time. Then, everybody was a child. There needed no fathers and mothers to take care of the children, because there was no danger or trouble of any kind, and no clothes to be mended, and there was always plenty to eat and drink. Whenever a child wanted his dinner, he found it growing on a tree; and if he looked at the tree in the morning, he could see the expanding blossom of that night's supper; or, at eventide, he saw the tender bud of to-morrow's breakfast. It was a very pleasant life indeed. No labor to be done, no tasks to be studied; nothing but sports and dances, and sweet voices of children talking, or caroling like birds, or gushing out in merry laughter throughout the livelong day.

It is probable that the very greatest disquietude which a child had ever experienced was Pandora's vexation at not being able to discover the secret of the mysterious box.

This was at first only the faint shadow of a Trouble; but every day it grew more and more substantial, until before a great while the cottage of Epimetheus and Pandora was less sunshiny than those of the other children.