A long series of works came into print during the last half of the 18th century having to do with the issues that had arisen between the Papacy, under Clement XIII and Pius VI and the Governments of Venice and of Naples. With a few exceptions, doubtless accidental, these works were duly prohibited, either by the Inquisition or the Congregation. The similar contests between Clement XIII and the Duke of Parma did not bring into the Index any fresh titles. A series of Spanish works written against the claims and contentions of the Holy See, printed during the same period, also escaped the attention of the editors of the Roman Indexes. The Indexes of this period contain the titles of a number of treatises on Church and State issued by the French author, Richet, and also of a series of monographs on the reform of the religious orders and on the policy to be pursued by the State with its non-Catholic citizens. The list also includes a monograph on the authority of the pope, published in Amsterdam in connection with the controversy concerning the Church at Utrecht. In 1764, were prohibited under a separate decree of the Congregation, a treatise by Bishop Frevorius, published in 1763, together with a series of less important works, all of which were concerned with the issues that had arisen between the Holy See and certain of the German bishoprics. In 1784, the Congregation prohibits the Introduction to Ecclesiastical Law written by Eybel; and in the following year was condemned, by a brief of Pius VI, the treatise by the same author on Confession. In 1786, the monograph by Eybel, issued under the title of _Was ist der Papst?_, was also prohibited in a separate brief. The editors of the Index evidently found it impracticable, however, to make place for the long series of similar publications by the controversial writers of Germany which came into print during the same period. The two or three titles selected cover some of the least important of the series. The selection was apparently made without any adequate knowledge of the material to be considered.