At last, on the 22d of April, 1858, he published, in three large volumes, the important work upon which he had labored since 1854. This work had two titles: the first, "Justice in the Revolution and in the Church;" the second, "New Principles of Practical Philosophy, addressed to His Highness Monseigneur Mathieu, Cardinal-Archbishop of Besancon." On the 27th of April, when there had scarcely been time to read the work, an order was issued by the magistrate for its seizure; on the 28th the seizure was effected. To this first act of the magistracy, the author of the incriminated book replied on the 11th of May in a strongly-motived petition, demanding a revision of the concordat of 1802; or, in other words, a new adjustment of the relations between Church and State. At bottom, this petition was but the logical consequence of the work itself. An edition of a thousand copies being published on the 17th of May, the "Petition to the Senate" was regarded by the public prosecutor as an aggravation of the offence or offences discovered in the body of the work to which it was an appendix, and was seized in its turn on the 23d. On the first of June, the author appealed to the Senate in a second "Petition," which was deposited with the first in the office of the Secretary of the Assembly, the guardian and guarantee, according to the constitution of 1852, of the principles of '89. On the 2d of June, the two processes being united, Proudhon appeared at the bar with his publisher, the printer of the book, and the printer of the petition, to receive the sentence of the police magistrate, which condemned him to three years' imprisonment, a fine of four thousand francs, and the suppression of his work. It is needless to say that the publisher and printers were also condemned by the sixth chamber. Proudhon lodged an appeal; he wrote a memoir which the law of 1819, in the absence of which he would have been liable to a new prosecution, gave him the power to publish previous to the hearing. Having decided to make use of the means which the law permitted, he urged in vain the printers who were prosecuted with him to lend him their aid. He then demanded of Attorney-General Chaix d'Est Ange a statement to the effect that the twenty-third article of the law of the 17th of May, 1819, allows a written defence, and that a printer runs no risk in printing it. The attorney-general flatly refused. Proudhon then started for Belgium, where he printed his defence, which could not, of course, cross the French frontier. This memoir is entitled to rank with the best of Beaumarchais's; it is entitled: "Justice prosecuted by the Church; An Appeal from the Sentence passed upon P. J. Proudhon by the Police Magistrate of the Seine, on the 2d of June, 1858." A very close discussion of the grounds of the judgment of the sixth chamber, it was at the same time an excellent resume of his great work.