Never was more cruel rebuff given to the generous efforts of a policy of sentiment: after having laid the foundation of the independence and unity of Italy, France had sympathized with Germany’s desire for unity, and few of the counsellors, or even the adversaries of the Empire, would not have defended this idea, which was supposed to lead to civilization. During that period of anxious waiting (beginning of July, 1870), when the most alarming news was daily published in Strasburg, it did not occur to any one to look back upon quotations from papers only a few years old, though in that very town a pamphlet might have been found, written by Edmond About in 1860, and containing the following words—

“Let Germany become united! France has no dearer or more ardent desire, for she loves the German nation with a disinterested friendship. France is not alarmed at seeing the formation of an Italian nation of 26,000,000 men in the South; she need not fear to see 32,000,000 Germans found a great people on the Eastern frontier.”

Proud to be first to proclaim the rights of nations; influenced by mingled feelings of kindliness, trustfulness, optimism and a certain vanity of disinterestedness, France, who loves to be loved, imagined that the world would be grateful for her international sociability, and that her smiles were sufficient to maintain peace and joy in Europe.

Far from being alarmed by certain symptoms in her neighbours, she voluntarily closed her eyes to the manœuvres of the Prussian troops, her ears to the roar of the artillery practice constantly heard across her eastern frontier; in 1863 patrols of German cavalry had come as far as Wissemburg. But people thought that Germany was “playing soldiers.” Duruy, who shared at that time the general delusion, wrote in some traveller’s notes published in 1864: “We have had your German Rhine, and though you have garnished it with bristling fortresses and cannon turning France-wards, we do not wish to have it again, ... for the time for conquests is past. Conquests shall only now be made with the free consent of nations. Too much blood has been poured into the Rhine! What an immense people would arise if they who were struck down by the sword along its banks could be restored to life!”

After the thunderclap of Sadowa, the French Government, believing, in its infatuation, that it was entitled to a share of gratitude and security, asked for the land along the Rhine as far as Mayence; this territorial aggrandizement might have compensated for Prussia’s redoubtable conquests. The refusal was not long in coming. The Rhenish provinces immediately swarmed with Prussian troops. The Emperor, awaking from his dream, hesitating to make war, sent another proposition to Prussia: that the Rhenish provinces should become a buffer State. The same haughty answer was returned. France then hoped for the cession of Luxemburg, a hope all the more natural in that the populations of Luxemburg were willing to vote for annexation to France, and such a policy would have been in accordance with the rights of nations. But this request, apparently entertained at first by Prussia, was presently hampered by intrigues which caused its rejection. Duped, not even treated as an arbiter, but merely as a contemptible witness, France dazzled herself for a moment with the brilliant Exhibition of 1867. But it was a last and splendid flash; the word which is the bane of nations and of sovereigns, “to-morrow,” was on the lips of the ageing Emperor. The reform in the French army, which should have been bold and immediate, was postponed and afterwards begun jerkily and unmethodically. Prussia however affected to be alarmed. Then irritation at having been duped, the evidence of a growing peril, a lingering hope in the military fortune of France—everything conspired to give an incident, provoked by Prussia, the proportions of a casus belli. But, in spite of so many grievances, people did not yet believe in this sudden return to barbarism. The Imperial policy had indeed been blindly inconsistent; after opening a wide prospect of unity before the German people it had been thought possible to say “No further than the Main,” as if the impetuous force of a popular movement could be arrested after once being started. France suddenly opened her eyes to her danger and to the failure of her policy. But if a noble sentiment of generosity had been mingled with the desire to increase her territory without shedding a drop of blood, she had had the honour of being in the vanguard of progress. Were great ideas of peace and human brotherhood about to be engulfed in a war which would throw Europe into an era of violence and brutality?

Pasteur, profoundly saddened, could not bear to realize that his ideal of the peaceful and beneficent destiny of France was about to vanish; he left Strasburg—never to return to it—a prey to the most sombre thoughts.

When he returned to Paris, he met Sainte Claire Deville, who had come back from a scientific mission in Germany, and who had for the first time lost his brightness and optimism. The war appeared to him absolutely disastrous. He had seen the Prussian army, redoubtable in its skilful organization, closing along the frontier; the invasion was certain, and there was nothing to stay it. Everything was lacking in France, even in arsenals like Strasburg. At Toul, on the second line of fortifications, so little attention was paid to defence that the Government had thought that the place could be used as a dépôt for the infantry and cavalry reserves, who could await there the order for crossing the Rhine.

“Ah! my lads, my poor lads!” said Sainte Claire Deville to his Ecole Normale students, “it is all up with us!” And he was seen, between two experiments, wiping his eyes with the comer of his laboratory apron.

The students, with the ordinary confidence of youth, could not believe that an invasion should be so imminent. However, in spite of the privilege which frees Normaliens from any military service in exchange for a ten years’ engagement at the University, they put patriotic duty above any future University appointments, and entered the ranks as private soldiers. Those who had been favoured by being immediately incorporated in a battalion of chasseurs à pied the dépôt of which was at Vincennes, spent their last evening—their vigil as they called it—in the drawing-room of the sub-director of the Ecole, Bertin. Sainte Claire Deville and Pasteur were there, also Duruy, whose three sons had enlisted. Pasteur’s son, aged eighteen, was also on the eve of his departure.

Every one of the students at the Ecole Normale enlisted, some as chasseurs à pied, some in a line regiment, others with the marines, in the artillery, even with the franc tireurs. Pasteur wished to be enrolled in the garde nationale with Duruy and Bertin, but he had to be reminded that a half-paralysed man was unfit for service. After the departure of all the students, the Ecole Normale fell into the silence of deserted houses. M. Bouillier, the director, and Bertin decided to turn it into an ambulance, a sort of home for the Normaliens who were stationed in various quarters of Paris.