was, however, in 1629, prohibited with the specification _cum auctor at suum tantum agnoscat librum qui Romae impressus est_. As a fact, however, no edition of this work was ever printed in Rome. =6. Protestant Jurists.=--During the first decade of the 17th century, the Index includes the names of a group of Protestant jurists, chiefly Germans and Hollanders. The titles specified cover, in the main, books which had no material importance and which never even reached the honour of a second printing. The subjects include not only books having to do with canon law or ecclesiastical relations but works of purely political importance. In the Spanish lists, the compilers have taken the pains to add after the number of the book the term _d.c._, and for a few works they themselves presented the expurgations required. In editions of the pandects and in the treatises having to do with the pandects, the prohibitions cover a number of books on such subjects as _de summa trinitate de fide Catholica_ and _de haereticis et paganis_. The Spanish Indexes include also certain treatises on usury (the authorities taking the Church ground that interest was indefensible) and two essays having to do with the requirement of the permission of parents for marrying. A number of books which in the Roman Index are prohibited altogether, are presented by the Spanish compilers with the term _d.c._ The noteworthy treatise of Puffendorf, _De statu Germanici Imperii_, first published in 1667, did not come to the attention of the Index compilers as a pernicious work until 1754. Other works by the same author which secured condemnation are the French edition of his introduction to the history of the great States, published in 1687 and prohibited in 1693; the _De jure naturae et gentium_, published in 1672 and prohibited in 1714; the _Introductio ad historiam Europaeam_, published in 1704, prohibited in 1737; the _De officio hominis et civis_, published in 1743, prohibited in 1752.