INDEX is a word that may be understood either specially as a table of references to a book or, more generally, as an indicator of the position of required information on any given subject. According to classical usage, the Latin word index denoted a discoverer, discloser, or informer; a catalogue or list; an inscription; the title of a book; and the fore or index-finger. Cicero also used the word to express the table of contents to a book, and explained his meaning by the Greek form syllabus. Shakespeare uses the word with the general meaning of a table of contents or preface—thus Nestor says {Troilus and Cressida, i. 3)—
“And in such indexes, although small pricks To their subsequent volumes, there is seen The baby figure of the giant mass.”...
Table was the usual English word, and index was not thoroughly naturalized until the beginning of the 17th century, and even then it was usual to explain it as “index or table.” By the present English usage, according to which the word table is reserved for the summary of the contents as they occur in a book, and the word index for the arranged analysis of the contents, we obtain an advantage not enjoyed in other languages , for the French table is used for both kinds, as is indice in Italian and Spanish. There is a group of words each of which has its distinct meaning but finds its respective place under the general heading of index work; these are calendar,catalogue, digest, inventory, register, summary, syllabus, and table. The value of indexes was recognized in the earliest times, and many old books have full and admirably constructed ones. A good index has sometimes kept a dull book alive by reason of the r ^alue or amusing character of its contents. Mr Carlyle refers to Prynne’s Histrio- Mastix as “a book still extant, but never more to be read by mortal;” but the index must have given amusement to many from the curious character of its entries, and Attorney· General Noy particularly alluded to it in his speech at Prynne’s trial. Indexes have sometimes been used as vehicles of satire, and the witty Dr William King was the first to use them as a weapon of attack. His earliest essay in this field was the index added to the second edition of the Hon. Charles Boyle’s attack upon Bentley’s Dissertation on the Epistles of Phalaris. 1698.
To serve its purpose well, an index must be compiled with care, the references being placed under the heading that the reader is most likely to seek. An index should be one and indivisible, and not broken up into several alphabets; thus every work, whether in one or more volumes, ought to have its complete index. This important rule has been often neglected in English books, and is almost universally rejected in foreign ones, to the great inconvenience of readers. The mode of arrangement calls for special attention; this may be either chronological, alphabetical, or according to classes, but great confusion will be caused by uniting the three systems. The alphabetical arrangement is so simple, convenient, and easily understood that it has naturally superseded the other forms, save in some exceptional cases. Much of the value of an index depends upon the mode in which it is printed, and every endeavour should be made to set it out with clearness. In old indexes the indexed word was not brought to the front, but was left in its place in the sentence, so that the alphabetical order was not made perceptible to the eye. There are few points in which the printer is more likely to go wrong than in the use of marks of repetition, and many otherwise good indexes are full of the most perplexing cases of misapplication in this respect. The oft-quoted instance— Mill on Liberty on the Floss actually occurred in a catalogue. There appears now to be a revived interest in indexes, and as books daily increase the need of some satisfactory digest of information becomes more keenly felt. In 1877 the Index Society was formed with the object of making and printing indexes of books unprovided with them, of compiling and printing indexes of particular subjects, and of gradually preparing a universal index for reference. In order to obtain uniformity in the compilation of indexes a series of rules for indexing have been drawn up by the society. Several publications have already been issued to the subscribers.
The following is a list of some of the most important indexes, both of words and of subjects. The chief indexes of words are dictionaries, but these are a special class by themselves. Next come concordances: the first one to the Bible was compiled by Hugo of St Cher in 1247, the first English concordance to the New Testament was published in 1536, and to the whole Bible in 1550, compiled by John Marbeck. Other Biblical concordances are those of R. F. Hervey, 1579; C. Cotton, 1622 (frequently reprinted); J. Downame, 1632; R. Wickens, 1655; S. Newman, 1650, 3d ed. 1682; A. Cruden, 1737 (this superseded all works of the same character); and R. Young, 1880. The following concordances may also be mentioned: —to the Psalter, 1834; to the Prayer Book, 1851; to the Iliad, by G. L. Prendergast, 1875 , to Shakespeare, by S. Ayscough (1790), by F. Twiss (1805), by Mrs Cowden Clarke (1845), by J. O. Halliwell {Handbook Index, 1866), and by A. Schmidt (1874) l and to Shakespeare’s Poems, by Mrs H. H. Furness, 1874; to Milton’s Paradise Lost (1741), and to his Poetical Works, by H. J. Todd (1809), byG. L. Prendergast (1857), and byC. D. Cleveland (1867); to Pope’s Works, by E. Abbott, 1875; to Tennyson’s Works, by D. B. Brightwell, 1869, and another published by Strahan, 1870; to In Memoriam (1862); to Keble’s Christian Year, 1871; and to Watts’s Psalms, by D. Guy, 1774. A large number of historical works have been supplied with indexes in separate volumes. Among the more important indexes of prose writers are those of the works of Samuel Richardson (1755), Joanna Southcott(n. d., and 1815), John Strype (1828), and T. Carlyle (1874); The Wellington Despatches (1839); Wesley’s Journals (1872). A large number of series of publications oι societies and of periodicals have been supplied with general indexes.
The Indexes to the Statutes and to the Journals of the Houses of Parliament are perhaps the most elaborate works of the kind ever published. In 1778 a sum of £12,900 was voted for indexes to the Journals of the House of Commons. Few parliamentary papers are issued without a satisfactory index being added. Most of the indexes mentioned above refer to particular books, but in 1848 Mr W. F. Poole published in New York an index to subjects treated in reviews and other periodicals; a second edition was published in 1853 as An Index to Periodical Literature. A greatly enlarged edition is now in preparation with the co-operation of English and American librarians. A larger work of a similar character for scientific literature, but arranged under authors’ names instead of subjects has been compiled by the Royal Society and is entitled Catalogue of Scientific Papers (1800-73), 8 vols. 4to, 1867- 1879. (H. B. W.*)
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INDEX LIBRORUM PROHIBITORUM is the title borne by the official list of those books which on doctrinal or moral grounds the Roman Catholic Church, under penalty of ecclesiastical censures, authoritatively forbids the members of her communion to possess or to read. Most Governments, whether civil or ecclesiastical, have at all times in one way or another acted on the general principle that some control may and ought to be exercised over the literature circulated among those under their jurisdiction; for various examples, both in ancient and in modern times, reference may be made to the article Bibliography (vol. iii. p. 658). The earliest known instance of a list of proscribed books being issued with the authority of a bishop of Rome is sometimes assigned to the pontificate of Gelasius (494) and sometimes to that of Hormisdas (514), but most probably ought not to be dated earlier than the 8th century. The document is for the most part, as its name implies, a Notitia Librorum Apocryphorum qτιi non recipiuntur, and chiefly consists of an enumeration of such apocryphal works as by their titles might be apt to mislead the unwary into attaching an undue weight to their teaching (the “Acts” of Philip, Thomas, Peter, Philip, and the Gospels of Thaddaeus, Matthias, Peter, James the Less, and others). Its concluding paragraph, however, sweepingly declares all the writings of Simon Magus and of many other heretics who are mentioned by name, as also of many more whose names have been completely forgotten (minime retinentur), to be repudiated, eliminated entirely from the Roman Catholic and Apostolic Church, and eternally condemned. Subsequent pontiffs continued to exhort the episcopate and the whole body of the faithful to be on their guard against heretical writings, whether ...old or new; and one of the functions of the Inquisition when it was established was to exercise a rigid censorship over books put in circulation. The bishops in their dioceses had always, however, a considerable discretion. With the discovery of the art of printing, and the wide and cheap diffusion of all sorts of books which ensued, the need for new precautions against heresy and immorality in literature made itself felt, and more than one pope (Sixtus IV. in 1479 and Alexander VI. in 1501) gave special direction to the archbishops of Cologne, Mainz, Treves, and Magdeburg regarding the growing abuses of the printing press; in 1515 the Lateran council formulated the decree De Impressione Librorum, which required that no work should be printed without previous examination by the proper ecclesiastical authority, the penalty of unlicensed printing being excommunication of the culprit, and confiscation and destruction of the books. The council of Trent in its fourth session, 8th April 1546, forbade the sale or possession of any anonymous religious book which had not previously been seen and approved by the ordinary; in the same year the university of Louvain, at the command of Charles V., prepared an “Index” of pernicious and forbidden books, a second edition of which appeared in 1550. In L557, and again in 1559, Pope Paul IV., through the Inquisition at Rome, published what may be regarded as the first Roman Index in the modern ecclesiastical use of that term (Index auctorum et librorum qui tanquarn hoeretici aut suspecti aut perversi ab Officio S. H. Inquisitionis reprobantur et in universa Christiana republica interdicuntur). All anonymous works published since 1519 were condemned without exception in this Index, which directed its hostility chiefly against works that seemed unfavourable to the claims of the Roman curia,, or maintained the superiority of councils over popes. A list of sixty-two printers of heretical books was appended. At the 18th session of the council of Trent ∙(26th February 1562), in consideration of the great increase in the number of suspect and pernicious books, and also of the inefficacy of the many previous “censures” which had proceeded from the provinces and from Rome itself, certain fathers were appointed to enquire into these “censures,” and to consider what ought to be done in the circumstances. At the 25th session (4th December 1563) this committee of the council was reported to have completed its work, but as the subject did not seem (on account of the great number and variety of the books) to admit of being properly discussed by the council, the result of its labours was handed over to the pope (Pius IV.) to deal with as he should think proper. In the following March accordingly were published, with papal approval, the Index librorum prohibitorum, which continues to be reprinted and brought down to date, and the “Ten Rules” which, supplemented and explained by Clement VIII., Sixtus V., Alexander VIΓ., and finally by Benedict XIV. (10th July 1753), still regulate the preparation of that catalogue. By the first of these rules the condemnation of all books already condemned by pope or council prior to 1515 is renewed; by the second the works of “heresiarchs” (Luther, Zwingli, Calvin, Schwenkfeld, Hübmaier) are condemned whatever be their subject, but it is provided that the non-religious works of those who are heretics merely may on examination and approval be permitted; the third and fourth relate to translations of the Bible; the fifth orders the expurgation of lexicons, concordances, and similar com« pilations by heretics; the sixth discourages the circulation of books in the vulgar tongue about controversies between Catholics and heretics; the seventh, eighth, and ninth relate to obscene or grossly superstitious publications; the tenth contains various details of procedure about the licensing of books, and concludes with the declaration that the possessor or reader of heretical books is forthwith to be excommunicated, while the possessor or reader of books prohibited on other grounds falls into mortal sin, and is to be dealt with severely at the discretion of the bishop. The business of correcting the Index to date is now in the hands of an ecclesiastical board known as the “Congregation of the Index,” which consists of a prefect (who is always a cardinal) and other cardinals, with whom are associated the “consultera” and “examiners of books” (qualificatores). The Index Librorum Expurgandorum or Expurgatorius catalogues the works which may be read after the deletion of specified passages. Bishops have the power of granting at their discretion the right to read forbidden books, except in some reserved cases, where the papal dispensation is required. The Roman Index is unfortunately very far from being an exhaustive catalogue of works inconsistent with Catholic orthodoxy, and thus lacks the interest and vast importance it would otherwise have had for the bibliographer.
The early Reformers, by their attitude towards writings which from their point of view seemed objectionable, furnished many an argumentum ad hominem to the Catholics (see Gretser’s learned work, De Jure et More prohibendi, expurgandi, et abolendi libros haereticos et noxios, 1603); thus we find Calvin writing to the ministers at Frankfort about one of the books of Servetus, with a view to its being burnt (Ep. 153). Gradually, however, all the Protestant churches have recognized the expediency of leaving individuals and communities practically free to select for their instruction and amusement the works which in the conscientious exercise of their own responsible judgment they may find best adapted to their wants.
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