In accordance with these recommendations, numerous prisons have been built or are now building in Europe. In England a model prison has been constructed at Pentonville, which is perhaps the best prison in the world. In the late Report of the Surveyor-General of Prisons, laid on the table of Parliament during its last session, it was expressly declared, from the experience gained in the Pentonville prison, "that the separation of one prisoner from another is indispensable as the basis of any sound system." As long ago as 1843, no less than seventeen prisons on this principle were built or building in different counties of England, and several in Scotland. In France the whole subject has undergone most thorough discussion by the press, and also in debate by the Chamber of Deputies. Among the works now before us is a volume of more than six hundred pages, filled by a report of this debate, with notes, which ended in the passage of a law during the last summer appropriating ninety millions of francs for the building of thirty prisons on the Separate system. Such is the testimony of France and England. Similar testimony comes from other quarters: from Prussia, where five prisons on this system have been built; from Denmark, where ten are now building; from Sweden, where eight are building under the auspices of the monarch, who, when Prince Oscar, wrote ably in advocacy of the Separate system; from Norway, where one is now building in the neighborhood of Christiania; from Poland, where one has long been in existence, and three others are nearly completed; from Hungary, where a project has been submitted to the Diet for the erection of ten on the Separate system; from Holland, where one is about to be erected on the plan of Pentonville; from Belgium, which has yielded to the Separate system, and has even engrafted it upon the famous _Maison de Force_ at Ghent, the model of our Auburn Prison; from the Duchy of Nassau; from the Grand Duchy of Baden; from Frankfort-on-the-Main; from Hamburg; from Geneva, in Switzerland: in all of which prisons on this system are built or are building. From poor, distracted Spain proceeds the same testimony. To this array of authorities and examples may be added two names of commanding weight in all matters of Prison Discipline,--Edward Livingston and Miss Dix. The first, whose high fortune it was to refine jurisprudence by his philanthropy, as he had illumined it by his genius and strengthened it by his learning, in his Introductory Report to the Code of Prison Discipline, as long ago as 1827, urged with classical eloquence a system of "seclusion, accompanied by moral, religious, and scientific instruction, and useful manual labor." Miss Dix, after attentive survey of different systems throughout our country, fervently enforces, as well in the publication now before us as in her Memorials, the merits of the Separate system, and of its administration in Pennsylvania.