Raising their heads, the three sons gaily nodded their approval, grateful as they felt for the lessons in heroism which she had given them, and apparently finding no reason why she might not live another twenty years in order to give similar lessons to Jean.

Pierre still remained in front of Marie, basking in all the rapture of love, when he felt Guillaume lay his hands upon his shoulders from behind. And on turning round he saw that his brother was also radiant, like one who felt well pleased at seeing them so happy. “Ah! brother,” said Guillaume softly, “do you remember my telling you that you suffered solely from the battle between your mind and your heart, and that you would find quietude again when you loved what you could understand? It was necessary that our father and mother, whose painful quarrel had continued beyond the grave, should be reconciled in you. And now it’s done, they sleep in peace within you, since you yourself are pacified.”

These words filled Pierre with emotion. Joy beamed upon his face, which was now so open and energetic. He still had the towering brow, that impregnable fortress of reason, which he had derived from his father, and he still had the gentle chin and affectionate eyes and mouth which his mother had given him, but all was now blended together, instinct with happy harmony and serene strength. Those two experiments of his which had miscarried, were like crises of his maternal heredity, the tearful tenderness which had come to him from his mother, and which for lack of satisfaction had made him desperate; and his third experiment had only ended in happiness because he had contented his ardent thirst for love in accordance with sovereign reason, that paternal heredity which pleaded so loudly within him. Reason remained the queen. And if his sufferings had thus always come from the warfare which his reason had waged against his heart, it was because he was man personified, ever struggling between his intelligence and his passions. And how peaceful all seemed, now that he had reconciled and satisfied them both, now that he felt healthy, perfect and strong, like some lofty oak, which grows in all freedom, and whose branches spread far away over the forest.

“You have done good work in that respect,” Guillaume affectionately continued, “for yourself and for all of us, and even for our dear parents whose shades, pacified and reconciled, now abide so peacefully in the little home of our childhood. I often think of our dear house at Neuilly, which old Sophie is taking care of for us; and although, out of egotism, a desire to set happiness around me, I wished to keep you here, your Jean must some day go and live there, so as to bring it fresh youth.”

Pierre had taken hold of his brother’s hands, and looking into his eyes he asked: “And you—are you happy?”

“Yes, very happy, happier than I have ever been; happy at loving you as I do, and happy at being loved by you as no one else will ever love me.”

Their hearts mingled in ardent brotherly affection, the most perfect and heroic affection that can blend men together. And they embraced one another whilst, with her babe on her breast, Marie, so gay, healthful and loyal, looked at them and smiled, with big tears gathering in her eyes.

Thomas, however, having finished his motor’s last toilet, had just set it in motion. It was a prodigy of lightness and strength, of no weight whatever in comparison with the power it displayed. And it worked with perfect smoothness, without noise or smell. The whole family was gathered round it in delight, when there came a timely visit, one from the learned and friendly Bertheroy, whom indeed Guillaume had asked to call, in order that he might see the motor working.

The great chemist at once expressed his admiration; and when he had examined the mechanism and understood how the explosive was employed as motive power—an idea which he had long recommended,—he tendered enthusiastic congratulations to Guillaume and Thomas. “You have created a little marvel,” said he, “one which may have far-reaching effects both socially and humanly. Yes, yes, pending the invention of the electrical motor which we have not yet arrived at, here is an ideal one, a system of mechanical traction for all sorts of vehicles. Even aerial navigation may now become a possibility, and the problem of force at home is finally solved. And what a grand step! What sudden progress! Distance again diminished, all roads thrown open, and men able to fraternise! This is a great boon, a splendid gift, my good friends, that you are bestowing on the world.”

Then he began to jest about the new explosive, whose prodigious power he had divined, and which he now found put to such a beneficent purpose. “And to think, Guillaume,” he said, “that I fancied you acted with so much mysteriousness and hid the formula of your powder from me because you had an idea of blowing up Paris!”