The feeling of indignation awakened in the public by the doctrines of Helvetius gave opportunity to the opponents of the "Encyclopaedia." That work was denounced to the Parliament of Paris, together with the book "De l'Esprit." The learned court promptly condemned the latter to the flames. The great compilation, on the other hand, of which the volume of Helvetius was said to be a mere abridgment, was submitted to nine commissioners for examination, and further publication was suspended until they should report. While proceedings before the Parliament were still pending, the Council of State intervened, and the "Encyclopaedia" was arbitrarily interdicted, its privilege taken away, the sale of the volumes already printed, and the printing of any more, alike forbidden. It is characteristic of the condition of things existing under the weak and vacillating government of Louis XV, that the interdict pronounced against the "Encyclopaedia" did not stop its printing. The editor and the publishers determined to prepare in private the ten volumes that were still unmade, and to launch them on the world at one time. To this work Diderot turned with boundless energy. D'Alembert, however, was discouraged, and retired from the undertaking. For six years Diderot labored on, never safe from interference on the part of the government, and managing a great enterprise, with its staff of contributors and its scores of workmen, while constantly liable to arrest and imprisonment. Diderot worked indefatigably also with his pen; writing articles on all sorts of subjects,--philosophy, arts, trades, and manufactures. To learn how things were made he visited workshops and handled tools, baffled at times by the jealousy and distrust of the workmen, who were afraid of his disclosing their secret processes, or of his giving information to the tax-gatherer.