One of the requisites of a successful librarian is a faculty of order and system, applied throughout all the details of library administration. Without these, the work will be performed in a hap-hazard, slovenly manner, and the library itself will tend to become a chaos. Bear in mind the great extent and variety of the objects which come under the care of the librarian, all of which are to be classified and reduced to order. These include not only books upon every earthly subject (and very many upon unearthly ones) but a possibly wide range of newspapers and periodicals, a great mass of miscellaneous pamphlets, sometimes of maps and charts, of manuscripts and broadsides, and frequently collections of engravings, photographs, and other pictures, all of which come in to form a part of most libraries. This great complexity of material, too, exhibits only the physical aspect of the librarian's labors. There are, besides, the preparation, arrangement and continuation of the catalogue, in its three or more forms, the charging and crediting of the books in circulation, the searching of many book lists for purchases, the library bills and accounts, the supervision and revision of the work of assistants, the library correspondence, often requiring wide researches to answer inquiries, the continual aid to readers, and a multitude of minor objects of attention quite too numerous to name. Is it any over-statement of the case to say that the librarian who has to organize and provide for all this physical and intellectual labor, should be systematic and orderly in a high degree?