Concordance

Concordance, a kind of index - generally verbal - to a book or a writer. The word came into especial use with reference to the Biblical Concordance, published in 1737 by Cruden. This was not an original idea, since there already existed a Concordance to the Vulgate. In 1845 Mrs. Cowden Clarke published a Shakspeare Concordance, and since then the principle has been applied to the works of many poets, and to the body of English poetry - or, at least, to the works of the best-known poets.