To make it a worthy guide to Jewish history in general, the index necessarily had to be more than a mere compilation of the five separate indexes. In the matter of the names of persons and places, accordingly, the general index excels the others in the fullness and completeness of the references. But its chief title to superiority over them lies in its character as an Index of Subjects, illustrated by such captions as _Blood Accusation_; _Conversions, forced_; _Coins_; _Emancipation of the Jews_; _Bulls, Papal_; _Apostasy_ and _Apostates_; _Messiah_ and _Messianic_; _Bible_ under the headings _Law_, _Old Testament_, _Pentateuch_, _Scriptures_, _Septuagint_, _Translations_, and _Vulgate_; _Education_ under the headings, _Colleges_, _Rabbinical_ and _Talmudical_, _Law_, _Schools_, _Talmud_, and _Talmud Torah_. These summaries will be suggestive, it is hoped, to the teacher of Jewish history and to the student with sufficient devotion to the subject to pursue it topically and pragmatically as well as in its chronologic sequence. As an illustration of what use may be made of it, the compiler has prefixed to the index a guide to the study of Jewish history by means of the biographies of its great men, an apostolical succession, as it were. Under the class-names there given, the names of all persons of each class will be found grouped in the index. Again, if it is desirable to trace out a topic, as, for instance, the development of Hebrew grammar, or the cultivation of medicine among Jews, etc., the index is helpful by means of its lists of names of grammarians, physicians, astronomers, historians, poets, etc., under these and similar heads. To facilitate its use, the student is urged to read the directions preceding the index. Great difficulties attach to the systematic arrangement of the names of persons connected with ancient and mediæval history of all kinds. In Jewish history, even down to recent times, these difficulties are largely increased by the comparatively late introduction among Jews of family names in the accepted modern sense, and by their introduction among Spanish Jews earlier than among the others. The scheme adopted by Zedner, in his British Museum catalogue, has been followed as far as the peculiarities of our author and his subject, and its presentation in a modern language, permitted it. The arrangement is not ideal, but every effort has been made to minimize the difficulties.