Josef laughed.

"Just you wait, Pierre Bretton!" was his retort. "Some day in the near future I'll remind you of those words. The first three weeks are not arduous, I'll agree. The next twelve or fourteen days are harder, though; there are more things to think of and more food to gather. And as for the last part of the time—it demands all the care and labor that you will wish to expend."

But Pierre only shrugged his shoulders sceptically.

In the meantime the silkworms continued to thrive. The weather was warm and sunny and no irregular conditions broke in upon the work until one afternoon Josef announced in a warning tone:

"There'll be rain to-morrow. You better gather double your supply of mulberry leaves; for if you wait until morning the trees will be dripping wet, so we cannot find food for our caterpillars."

It was a timely forecast, for the old servant's prediction proved a true one, and thanks to his thoughtfulness, the crop of the youthful sericulturists escaped famine. After that the silk-raisers kept their eyes out for the possibility of showers or stormy weather. Never for an hour did they run out of food to supply the busy little creatures that were to earn for the Bretton family a livelihood. Tirelessly they fed the caterpillars; tirelessly cleared away the litter that it might not ferment and cause malady, or bury the worms beneath its weight and render them hot and torpid. For it was by keeping them vigorous and alert, with plenty of fresh food and fresh air that they would develop the heartiest appetite, grow the fastest, and spin the largest cocoons. All these points were too important to be overlooked. Whenever the litter accumulated too fast or failed to drop through the grating of the shelves the caterpillars were gently removed on a cluster of fresh mulberry leaves to another spot, and the place made clean and tidy.

Then came a day when the silkworms began to cease eating and instead paused idly, with heads upraised.

"They are ready for their first moulting!" exclaimed Josef. "They want to peel off their tight clothing. Watch and see if I am not right."

And sure enough! The great transformation took place even as the old servant had said it would. Off came the skins—cap, shoes, and all!

The boy and girl were delighted.