In the Boston Public Library, the assistants are required to possess an adequate knowledge of Latin, French, and German. And all candidates for positions in the reading-room of the British Museum Library must undergo a thorough test examination as to their knowledge of the Latin language. Opportunities for acquiring foreign languages are now so abundant that there is small excuse for any one who wants to know French, Latin or German, and yet goes through life without learning them. There are even ways of learning these languages with sufficient thoroughness for reading purposes without a teacher, and sometimes without a text-book. Two assistant librarians taught themselves French and German in their evenings, by setting out to read familiar works of English fiction in translations into those languages, and soon acquired a good working knowledge of both, so as to be able to read any work in either, with only occasional aid from the dictionary for the less common words. It is surprising how soon one can acquire a sufficient vocabulary in any language, by reading any of its great writers. A good way for a beginner to learn French without a master is to take a French New Testament, and read the four Gospels through. After doing this three or four times, almost any one who is at all familiar with the Scriptures, will be able to read most books in the French language with facility. In the great art of learning, all doors are easily unlocked--by those who have the key. It should go without saying that the librarian should possess a wide knowledge of books. This knowledge should include (1) an acquaintance with ancient and modern literature, so as to be able to characterize the notable writers in each of the leading languages of the world; (2) a knowledge of history extensive enough to enable him to locate all the great characters, including authors, in their proper century and country; (3) a knowledge of editions, so as to discriminate between the old and the new, the full and the abridged, the best edited, best printed, etc.; (4) an acquaintance with the intrinsic value or the subject and scope of most of the great books of the world; (5) a knowledge of commercial values, so as to be able to bid or to buy understandingly, and with proper economy; (6) a familiarity with what constitutes condition in library books, and with binding and repairing processes, for the restoration of imperfect volumes for use. The librarian should be one who has had the benefit of thorough preliminary training, for no novice is qualified to undertake the role of an expert, and any attempt to do so can result only in disappointment and failure. No one who has read little or nothing but novels since leaving school need ever hope to succeed.