Divine Law is evidently most fitly succeeded by Human Law, or Jurisprudence. The fulness with which the preceding section has been treated will enable me to pass very cursorily over this and its successors. I may be pardoned, however, one remark suggested by the introduction of a new division—that in the classification of a library it should be considered whether the scope of the collection is special or general. In arranging a mere collection of Law Books it would be proper to commence with works treating of the general principles of Jurisprudence. In arranging a great library, regard must be had to the harmonious connection of the parts, and accordingly the Museum arrangement commences with Ecclesiastical Law as the natural sequel of Theology. Bulls, Councils, Canon-Law and Modern Church-Law introduce the great section of Roman Law. Oriental Law follows, the Laws of the Continental Nations succeed in the order previously explained, and thus room is only found for General Jurisprudence at a comparatively late period, at the beginning of the numeral series 6000. It brings after it such minor subjects as Prison-Discipline and Forensic Medicine. The remaining space of the section is occupied by the Law of the English-speaking nations, which requires most minute subdivision. Next to Divinity and Law, the third rank among the pursuits of the human mind was anciently assigned to Medicine. We have learned to recognise that Medicine, however practically important, ranks scientifically only as a department of Biology. The next section, accordingly, commences with general Natural History, continuing through the natural kingdoms of Botany, Geology, and Zoology, including Veterinary Surgery, with their appropriate subdivisions, and then embracing Medicine—first in its general aspect, as medical principle and practice; then in its great leading divisions of Physiology, Pathology, Therapeutics, &c.; again, as Special Pathology; finally, in such comparative minutiæ as professional controversies and bills of mortality. The divisions of Art—the next class—are simple and obvious. They may be enumerated as Archæology, Costumes, Numismatics, Architecture, Painting, Sculpture, first as treated collectively, and then as treated separately; and, finally, Music. Fine Art is succeeded by Useful Art, and the interval bridged over by Field-Sports, Games of Chance, and Games of Skill. No subdivision of the Useful Arts has been attempted beyond the separation of Cookery and Domestic Economy from the rest, and the addition of two special sections, one for the catalogues of industrial exhibitions, the other for the voluminous and important publications of the South Kensington Museum.