The opportunity was found on April 18, when it became known that the royal family were moving to St. Cloud. Easter was at hand; and at Easter, the king of France used to receive communion in public. But Lewis could not receive communion. He was responsible for the Civil Constitution which he had sanctioned, and for the schism that was beginning. With that on his conscience he was required to abstain, as people would otherwise infer that neither he nor the priest who absolved him saw anything to regret in the rising storm. Therefore to avoid scandal it was well to be out of the way at the time. The royal family were stopped at their very door, as Mirabeau had desired. For more than an hour they sat in the carriage, hooted and insulted by the mob, Lafayette vainly striving to clear the way. As they returned to the palace, the queen indiscreetly said to those about them: "You must admit now, gentlemen, that we are not free." The case for flight was strengthened by the events of that day, except in the eyes of some who, knowing the suggestion of Mirabeau, suspected a comedy, and wondered how much the king had paid that a howling mob might call him a fat pig to his face.
The emperor could no longer refuse aid to his sister without the reproach of cruelty. He was now requested to move troops near enough to the frontier to justify Bouillé in forming a camp in front of Montmédy, and collecting supplies sufficient for the nucleus of a royal army. He was also asked to advance a sum of money for first expenses. Leopold, who scarcely knew Marie Antoinette, showed extreme reserve. His hands were not free in the East. He sympathised with much of the work of the Revolution; and he was not sorry to see France weakened, even by measures which he disapproved. His language was discouraging throughout. He would promise nothing until they succeeded in escaping; and he believed they could not escape. The queen resolved to discover whether the gross indignity to which she had been subjected had made some softening impression on her brother; and the Count de Durfort was sent to seek him in his Italian dominions, with ample credentials. The agent was not wisely chosen. He found Leopold at Mantua, conferring with the Count d'Artois, and he fell into the hands of Calonne. On his return he produced a paper in twenty-one paragraphs, drawn up by Calonne, with the emperor's replies, showing that Leopold would invade France in the summer, with 100,000 men, that the royal family were to await his coming, and that, in effect, he had accepted the programme of the émigrés.
The queen was persuaded that she would be murdered if she remained at Paris while her brother's forces entered France. She believed that the émigrés detested her; that they were prepared to sacrifice her husband and herself to their own cause; and that if their policy triumphed, the new masters would be worse than the old. She wrote to Mercy that it would become an intolerable slavery. She resolved to incur the utmost risk rather than owe her deliverance to d'Artois and his followers. Marie Antoinette was right in her estimate of feeling in the émigré camp. Gustavus III. spoke for many when he said, "The king and queen, personally, may be in danger; but that is nothing to a danger that threatens all crowned heads."
After their arrest at Varennes, Fersen was amazed at the indecent joy of the French in Brussels, of whom many avowed their satisfaction that the king and queen were captured. For the plan concerted with Bouillé was to serve monarchy, not aristocracy. In her passionate resistance to the party of d'Artois, Condé, and Calonne, the queen felt herself the champion of popular royalism. In the language of the day, she was for a counter-constitution, they for a counter-revolution. There was a personal question also. The queen relied on Breteuil to save her from Calonne, whom she suspected of having tampered with the king's confessor to learn Court secrets. When she saw the answer from Mantua, she at once knew his hand. If that was her brother's policy, it was time to make a rush for freedom. The Jacobin yoke could be borne, not the yoke of the émigrés. Breteuil warned them to lose no time, if they would escape from thraldom to their friends. When Marie Antoinette resolved that flight with the risk of capture would be better than rescue by such hands, she knew but half the truth. The document brought back from Mantua by Durfort was a forgery. It governed history for 100 years; and the genuine text was not published until 1894. And we know now that Calonne, behind the back of the Count d'Artois, fabricated the reply which lured the king and queen to their fate. On June 9 Mercy wrote that they were deceived. In their terror and uncertainty, they fled. The first motive of Lewis had been the horror of injuring a religion which was his own. When he signed the decree imposing the oath on the clergy, which began the persecution, he said, "At least, it is not for long."
The elections to the next Assembly were appointed for July 5. If the first Assembly was allowed to accomplish its work, all that had been done to discredit one party and to conciliate another, all the fruit of Mirabeau's expensive intrigues, would be lost. The final determination that sent them along the road to Varennes was the treason hatched at Mantua. They ran the gauntlet to the Argonne in the cause of limited monarchy, to evade revolution and reaction. That was the spirit in which Mirabeau urged departure, and in which Bouillé came to the rescue; and it is that which made the queen odious to the expatriated nobles. But it was not the policy of Breteuil. He refused to contemplate anything but the restoration of the unbroken crown. The position was ambiguous. Contrary forces were acting for the moment in combination. Between the reactionary statesman and the constitutional general, there was no security in the character of the king.
The calculation on which the flight to Montmédy was undertaken was not, in itself, unreasonable. There was a strong party in the Assembly with which it was possible to negotiate. In the Rhone district, along the Loire, in parts of western and southern France, hundreds of thousands of the most intrepid men on earth were ready to die for the altar and the throne. But they were not willing to expose themselves for a prince in whose hands the best cause was doomed to fail, and whose last act as king was to betray his faithful defenders. Instigated by Bouillé, the queen asked her brother to lend some regiments to act with the royal forces as auxiliaries in case of resistance. She wished for 30,000 men. That is the significant fact that justifies the postmaster of St. Ménehould and the patriots of Varennes. The expedition to Montmédy was a first step towards civil war and foreign invasion. That is what these men vaguely understood when they stopped the fugitives.
For the management of the journey the best advice was not always taken. Instead of two light carriages, the royal party insisted on travelling in one large one, which Fersen accordingly ordered. The route by Rheims would have been better, because Varennes was off the post road. But Varennes was preferred on the ground that Rheims was the coronation city, and the king might be recognised. The shortest way to Montmédy passed through Belgian territory; but it was thought dangerous to cross the frontier. It was urged that a military display on the road would lead to trouble, but it was decided that it was necessary beyond Châlons. Bouillé's advice was not always sound, but there was one point on which it proved fatal to reject it. He wished the travellers to be accompanied by an experienced officer, whom he knew to be masterful, energetic, and quick in an emergency. The king thought of several, but the queen was disinclined to have a stranger in the carriage. But she asked for three able-bodied officers, to be employed as couriers, adding that they need not be unusually intelligent. In those words the coming story is told. The three couriers answered too faithfully the specified qualification.
The departure had been fixed for the second week of June. Bouillé still hoped for a movement among the imperialists, and he requested a delay. On the 16th he was informed that the royal family would start at midnight on the 20th. He had sent one of his colonels, the Duke de Choiseul, to Paris for the last instructions. Choiseul's horses were to fetch the king at Varennes, and he was to entertain him in his house at Montmédy. He had the command of the farthest detachment of cavalry on the road from Montmédy to Châlons, and it was his duty to close up behind the royal carriage, to prevent pursuit, and to gather all the detachments on the road, as the king passed along. He would have arrived at the journey's end with at least 400 men. His last orders were to convey the king across the frontier, if Bouillé should fall. The great abbey of Orval was only a few miles away, and it was thought that, at the last moment, it might be found safer than the hostile soil of France.
Choiseul was not equal to the difficult part he had to perform. He set out for his post on the Monday afternoon, carrying with him a marshal's baton, which had belonged to his uncle, and the queen's hairdresser, Léonard. For Thursday was the solemn festival of Corpus Christi, when a military mass would be celebrated in the camp, and, in the presence of the assembled army, Bouillé was to be made a marshal of France. The queen could not be allowed to appear at such a function without the artist's help, and he was hurried away, much against his will, without a word of explanation. The king's sister learned the same day what was before her. There had been an idea of sending her on with the children, or with the Countess of Provence. The Princess, who was eminently good, and not always gracious, did not enjoy the confidence of the queen. She was one of those who regarded concession as surrender of principle, and in the rift between the Princes and Marie Antoinette she was not on the side of compromise. Provence came to supper, and the brothers met for the last time. That night their ways parted, leading the one to the guillotine, and the other to the throne which had been raised by Napoleon above every throne on earth. The Count and Countess of Provence both started at the same time as the rest, and reached Belgium in safety.
Fersen, directing matters with skill and forethought, made one mistake. Two attendants on the royal children were taken, in a hired carriage, to Claye, the second stage on the eastern road; and it was their driver who made known, on his return, which way the fugitives had taken.