For a long time it was thought that when these clever bees, usually so prudent and well-advised, left the treasures of their kingdom and sought a future that was so full of uncertainty, they were obeying some foolish impulse, some suggestion that had no especial meaning. It is our habit, when we consider the bees, to say that all that we do not as yet understand is just due to fate, that it happens because it had to happen. But now that we have discovered two or three of the secrets of the hive, we have learned why it is that the bees swarm; the reason being merely that the generation at present in the hive has thought it its duty to sacrifice itself on behalf of the generation that is to come. The fact that this is the case can easily be proved. If the bee-keeper chooses to destroy the young queens in their cells, to enlarge the store-houses and dormitories in the hive, all the restlessness, confusion, the stir and the worry, would at once disappear. The bees would immediately take up their work again and revisit the flowers; the old queen, having no one to fill her place, would give up her great desire for the light of the sun, and decide to remain where she was. All her doubts as to the future being now set at rest, she would peacefully continue her labors, which consist in the laying of two or three thousand eggs a day, as she passes from cell to cell, omitting none, and never pausing to rest. This particular hive, however, that we are now watching, has not been interfered with by man; the bees have been left to do what seemed right to them. On the appointed day then, the beautiful day, whose dawn, still moist with the dew, comes nearer and nearer beneath the trees, approaching with radiant and glowing steps, the bees all become impatient, and feverishly restless. Over the whole surface of the golden corridors that divide the walls of the hive, the workers are busily making preparations for the journey. Each one will first of all provide herself with honey sufficient for five or six days. From this honey that they carry within them they will distil the wax needed to build the new home. They will take with them also some kind of solid substance with which they will afterwards block up all the holes, strengthen weak places, varnish the walls and shut out the light; for the bees love to work in complete darkness, guiding themselves with their wonderful eyes, or perhaps with their antennæ, or feelers, which very possibly possess some sense, unknown to us, that enables them to triumph over the darkness.