The English reader has now, in the first three volumes of this Library, a complete collection of the historical writings of the Fathers, whose permanent value, as sources, is universally acknowledged. Several of them have never before appeared in English. The unavoidable delay in the publication of the third volume has been very annoying to the general editors and publishers, but the subscribers will be amply compensated by the addition of the writings of Rufinus, which were not promised in the prospectus. It is encouraging that this difficult and costly enterprise is beginning to be duly appreciated by competent judges on both sides of the Atlantic.