The more they investigated the more varieties of mulberries came to light. There was the Tartarica, or Tartar mulberry, found on the Volga; the Papyfera, or paper mulberry, from Japan; the Chinese mulberry; and the more common varieties of red, black, and white mulberry. To the soil of southern France the so-called white mulberry tree seemed best adapted, and therefore the French peasants began cultivating it extensively, mingling with it, however, some of the rarer Chinese cuttings when these could be secured.

Many a lesson did the people learn about the mulberry tree while they were perfecting its growth! They found the leaves could be reached much more easily if the top of the tree was clipped so that it would grow low and bushy; this enabled children to harvest the leaves, and did away with expensive labor. But because of the luxuriant climate of France and Italy the trees of those countries could seldom be kept low, and usually gatherers had to use ladders to reach the leaves—a process by which many of them were injured and rendered useless. As no silkworm would touch a bruised leaf much of the crop was wasted. In China, where the trees seldom grew beyond the size of shrubs, the conditions for gathering perfect leaves were ideal; especially as the Chinese cut away much of the under part of the trees, so that the gatherers might go in beneath them. In addition to these interesting facts people discovered that if a single twig was broken from the mulberry tree several new shoots would branch out in its place. This was surely a valuable thing to know. Moreover, they learned that the leaves of the white mulberry were the most tender; that those of the red ranked next; and that the black came last in delicacy. Few French or Italian people used the black, but in the colder countries, where it flourished better than did other kinds, it was used almost entirely. Another delightful discovery of the sericulturists, as silkworm raisers are called, was that when their mulberry trees were once properly planted they would, with good care, live to a marvelous old age—some of them even reaching the dignity of two or three hundred years. But unless snails and other destructive grubs were kept away the trees would not thrive. The finer and more carefully grafted they were the greater the damage resulting from hungry insects. In contrast the wild mulberry with its acid and bitter sap presented far less temptation and therefore lived longer than did the cultivated species.

This and many another lesson did the father of Marie and Pierre have to learn before he could successfully raise mulberry trees—to say nothing of silkworms. He must know how to prepare the mulberry seeds by crushing the fruit, covering the pulp with water, and separating the seeds from the waste part of the berry. He must know, too, how to spread the seeds upon cloth and lay them in the sun to dry, after which they were put away in covered jars, secure from air and moisture, and stored in some dark place until needed for planting.

To Marie and Pierre, brought up amid the environment of many a mulberry grove, these facts were an old story, and how fortunate it was that this was so. Now that their father and Uncle Jacques had gone to the war most of the care of the silkworms would fall to them. There was, to be sure, Josef the old gardener—he could give advice; but he was too old and crippled to do much work.

And therefore it was the two children, together with their mother, who were planning for their first harvest of cocoons, and were eagerly awaiting the unfurling of the mulberry leaves before beginning to hatch out their crop of silkworm eggs. How anxiously they had watched the trees! How eagerly scanned the swelling buds! Ah, it could not be long now. Was not the river a torrent from the melting of the winter's snows? Was not the sun warmer, the heaven bluer, the ground fragrant as if newly awake? Soon the mulberry trees would be sending forth their leaves. Until they did, however, it would be useless to hatch the eggs so carefully laid away, for there would be no food to give the ravenous little spinners should they rouse from their long sleep.

And so Marie, and Pierre, and their mother strove to be patient, contenting themselves in the meantime with preparing the empty rooms of the silk-house, where the caterpillars were to be raised. Many a time they had not only seen this done but had assisted in the process. Every step of the work was familiar. They knew well that the labor of making the place immaculate was far from wasted, for unless the rooms were spotless the fastidious spinners would either sicken and die, or would refuse to fashion their wonderful webs.

M. Bretton, who had spent a good portion of his slender income in constructing the up-to-date shelter that housed his caterpillars, often laughingly declared that their accommodations were far more luxurious than were those where his own family lived. Nevertheless it was money well invested, he argued, since already he had got back from the sale of his cocoons many times over what the plant had cost him. So successful had he been that his example had been followed by many of his more prosperous neighbors until now Bellerivre, tiny as it was, could boast as fine equipment for sericulture as could be found in all France.

Poor M. Bretton! How proud he had been of his handiwork! How modestly exultant over his good fortune! And now that he had been forced to abandon it all and go to the Great War it was unthinkable to his wife and children that they should not take up his work and strive to carry it on. Nay, the very bread they ate depended upon their doing so.

Hence do you marvel that Marie, Pierre, and Madame Bretton labored early and late and denied themselves many things they wanted, that instead the money might be spent to further the industry that M. Bretton had cherished? And since what we work for becomes the centre of our interests it logically followed that all three of them found their task an absorbingly fascinating one. Playtime and study were cast cheerfully aside, and in place of them the boy and girl received each day the more vital compensations that come from unselfishness and hard work.

It was Marie who first detected that the buds near the ends of the mulberry branches were opening.