When his time of probation was passed, he decided to enter a convent at Solesmes, and by submitting himself to convent rules, make sure of his vocation. But before making any final choice, we find from his letters that "if France were invaded," he claimed "the right to do his duty as a citizen and a son."
He entered the convent at Solesmes, first as a postulant, then as a novice. "The Holy Gospels," said his superior, "Saint Paul's Epistles, and the Psalms were his favorite studies,—the food on which his piety was chiefly nourished. He also sought Christ in history."
Still, he was not entirely satisfied with life in a convent; he wished to be more actively employed in doing good. He therefore became a student for the regular ministry,—a Seminarist of Saint-Sulpice. But when the Prussian armies were advancing on Paris, he offered himself for hospital service, as did also his brother.
In a moment of passionate enthusiasm, speaking to that dear brother of the dangers awaiting those who had to seek and tend the wounded on the field of battle, he cried: "Do you think God may this year grant me the grace of yielding up my life to Him as a sacrifice? For to fall, an expiatory sacrifice beneath the righteous condemnation that hangs over France, would be to die for Him."
The war being over, he returned to the Seminary, March 15, 1871. On March 18 the Commune was declared, and Lecomte and Thomas were murdered; shortly after this the Seminary was invaded, the students were dispersed, and the priests in charge made prisoners. Most of the young men thus turned out into the streets left Paris. Paul at first intended to remain; but thinking that his family would be anxious about him, he applied for a pass, intending to go to Lyons. At the prefecture of police he and a fellow-student found a dense crowd waiting to pay two francs for permission to get away. They were shown into a room where a man in a major's uniform sat at a table covered with glasses and empty bottles, with a woman beside him. When he heard what they wanted, he broke into a volley of abuse, and assured them that the only pass he would give them was a pass to prison. Accordingly, Paul and his companion soon found themselves in the prison connected with the prefecture. The cells were so crowded that they were confined in a corridor with six Jesuit fathers and some of their servants and lay brethren. A sort of community life was at once organized, with daily service and an hour for meditation. Paul esteemed it a privilege to enjoy the conversation of the elder and more learned priests. He conversed with them about the Bible, philosophy, and literature; "He was ready," says a companion who was saved, "to meet a martyr's death; but there was one horror he prayed to be spared,—that of being torn in pieces by a mob."
On May 13, a turnkey announced to the priests that they were to leave the prefecture. "I fear," he said, "that you are to be taken to Mazas. I am not sure, but a man cannot have such good prisoners as you are in his charge without taking some interest in them."
On being brought forth from their corridor, they found themselves in a crowd of priests (hostages like themselves) who were being sent to Mazas. The youth of the Seminary students at once attracted attention, and the Vicar-General, Monseigneur Surat, said: "I can understand that priests and old men should be here, gentlemen, but not that you, mere Seminarists, should be forced to share the troubles of your ecclesiastical superiors."
The transfer to Mazas was in the voitures cellulaires. They were so low and narrow that every jolt threw the occupant against the sides or roof. In one of these cells the venerable and infirm archbishop had been transferred to Mazas a short time before.
Each prisoner on reaching Mazas was shut up in a tiny cell. Paul wrote (for they were allowed writing materials):
"I have a nice little cell, with a bit of blue sky above it, to which my thoughts fly, and a hammock, so that it is possible for me to sleep again. I hardly dare to tell you I am happy, and am trusting myself in God's hands, for I am anxious about you, and anxious for our poor France. I have my great comfort,—work. I have already written an essay on Saint Paul, which I have been some time meditating. I am expecting a Bible, and with that I think I could defy weariness for years. A few days ago I discovered that one of my friends was next to me. We bid each other good night and good morning by rapping against the wall, and this would make us less lonely, were we oppressed by solitude."