[late Latin concordantia, harmony, from cum, with, and cor, heart] "literally agreement, harmony; hence derivatively a citation of parallel passages, and specifically an alphabetic arrangement of the words contained in a book with citations of the passages in which they occur." --Encyclopedia Britannica, 11th ed.The most common concordances are Biblical and Shakespearean, but researchers have worked the same laborious magic on many other authors. I found Rosenbaum's Concordance to the Poems of Emily Dickinson quite by accident while looking through the following list:
W&L CATALOG 139 entries found for 'concordance' (a few pruned --and a search for 'concordances' yields a slightly different set)
1 New concordance of the Bible 2 A complete contextual concordance to Franz Kafka, Der Prozess 3 A concordance to Shih ching 4 A concordance to Baudelaire's Les fleurs du mal 5 Adam Smith's An inquiry into the nature and causes of the wealth of nations: a concordance 6 All's well that ends well; a concordance to the text of the first folio 7 An analytical concordance to the Revised Standard Version of the New Testament 8 Analytic concordance to the Bible : on an entirely new plan 9 Antony and Cleopatra. A concordance to the text of the first folio 10 As you like it; a concordance to the text of the first folio 12 The Bicentennial concordance : indexes to the Constitution of the United States of America 14 A commentary on Emerson's early lectures (1833-1836) with an index-concordance 15 A complete and systematic concordance to the works of Shakespeare 16 A complete concordance to Science and health, with key to the Scriptures 17 The complete concordance to Shakspere: 18 A complete concordance to the Holy Scriptures of the Old and New Testament 19 Complete concordance to Miscellaneous writings 20 A complete word and phrase concordance to the poems and songs of Robert Burns 21 The comprehensive concordance to the Holy Scriptures 22 Concordantia et index Caesaris = Concordance and index to Caesar 23 Concordance of proper nouns in the five-volume English-language Selected works of Mao Tse-tung 24 Concordance of statistics available in selected Federal Reserve publications 25 Concordance of the Divina commedia 26 A concordance of the works of Horace 27 A concordance of the Quran 28 A concordance of the poetry in English of Gerard Manley Hopkins 29 A concordance of Walt Whitman's Leaves of grass 30 A concordance to Beowulf 31 Concordance to Baudelaire's Petits poemes en prose 32 A concordance to Darwin's Origin of species, first edition 33 A concordance to Darwin's The expression of the emotions in man and animals 34 A concordance to Ezra Pound's Cantos 35 A concordance to Finnegans wake 36 A concordance to Marivaux's comedies in prose 37 A concordance to Milton's English poetry 38 A concordance to Personae: the shorter poems of Ezra Pound 39 A concordance to the plays of William Congreve 40 A concordance to The poems of Edward Taylor 41 A concordance to "The Spectator" 42 A concordance to the poems of Alexander Pope 43 A concordance to the poems of Ralph Waldo Emerson 44 Concordance to the poetry of Wallace Stevens 45 A concordance to the entire works of Alfred Tennyson 46 A concordance to the poems of Edmund Spenser 47 A concordance to the poems of John Keats 48 A concordance to the complete works of Geoffrey Chaucer 49 Concordance to the poetical works of John Dryden 50 A concordance to the poetry of Samuel Taylor Coleridge 51 A concordance to the complete poetical works of Sir Thomas Wyatt 52 A concordance to the poetry of Byron 53 A concordance to the Russian poetry of Fedor I. Tiutchev 54 A concordance to the Batifolle letters 55 A concordance to the poems of Ben Jonson 56 A concordance to The complete poems of John Wilmot, Earl of Rochester 57 A Concordance to the Apocrypha/Deuterocanonical books of the RSV 58 A concordance to the Holy Scriptures 59 A concordance to the English prose of John Milton 60 A concordance to the complete poems of E. E. Cummings 61 Concordance to the poetry of Edgar Allan Poe 62 A concordance to the English poetry of Gerard Manley Hopkins 63 A concordance to the sonnet sequences of Daniel, Drayton, Shakespeare, Sydney and Spenser 64 A concordance to the Greek Testament 65 A concordance to the poems of William Wordsworth 66 A concordance to the Divine comedy of Dante Alighieri 67 A concordance to the poems of Emily Dickinson 68 A concordance to the poems of W. B. Yeats 69 A concordance to the English poems of John Donne 70 A concordance to the poems of Matthew Arnold 71 A concordance to the poems of Marianne Moore 72 A concordance to the Constitution of the United States of America 73 A concordance to The poetry of Robert Frost 74 Coriolanus; a concordance to the text of the first folio 75 A critical concordance of the Tibullan corpus 76 A critical lexicon and concordance to the English and Greek New Testament 77 Cymbeline; a concordance to the text of the first folio 78 De concordantia Catholica. 79 Derivatives of links : Milnor's concordance invariants and Massey's products 80 The Eerdmans analytical concordance to the Revised Standard Version 81 The Englishman's Greek concordance of the New Testament 82 The exhaustive concordance of the Bible 83 THE EXHAUSTIVE CONCORDANCE TO THE UNITED STATES CONSTITUTION 84 The Federalist concordance 85 The Federalist concordance 86 A glossarial concordance to the Riverside Chaucer 87 Harper's topical concordance 88 He Kaine Diatheke = The New Testament in Greek 89 Henry VI: a concordance to the text of the first folio 90 Henry VIII: a concordance to the text of the first folio 91 Henry V: a concordance to the text of the first folio 94 Brief concordance to the Holy Scriptures 95 The home book of Shakespeare quotations 96 The hymns of Zoroaster, usually called the Gathas 97 The illuminated Bible 99 Keynes's The general theory of employment, interest and money: a general concordance 100 King John: a concordance to the text of the first folio 103 A lexical concordance to the poetical works of Percy Bysshe Shelley 104 Love's labour's lost: a concordance to the text of the first folio 105 Macbeth: a concordance to the text of the first folio 106 Maurice Sceve : Concordance de la Delie 107 The meaning of hope, a biblical exposition with concordance 108 Melville's "Benito Cereno" : an interpretation with annotated text and concordance 109 The Merchant of Venice; a concordance to the text of the first folio 110 A Midsummer night's dream: a concordance to the text of the first folio 111 Much ado about nothing: a concordance to the text of the first folio 112 A multiple disjunction lemma for smooth concordance 113 Nelson's complete concordance of the Revised standard version 114 A new and complete concordance or verbal index to words, phrases and passages in the dramatic works of Shakespeare 115 New concordance to the Holy Bible 116 NIV compact concordance 117 The NRSV concordance unabridged 118 Paradise lost; a concordance 119 The people's standard edition of the Holy Bible 120 Pericles, a concordance to the text of the first folio 121 Pushkin : a concordance to the poetry 122 Richard II: a concordance to the text of the first folio 123 Richard III: a concordance to the text of the first folio 124 Romeo and Juliet; a concordance to the text of the first folio 127 Supplementary concordance to the minor Italian works of Dante 128 Synchronismes chinois : chronologie complete et concordance avec lere chretienne de tous les dates... 129 The Taming of the shrew; a concordance to the text of the first folio 130 Titus Andronicus. A concordance to the text of the first folio 131 Troilus and Cressida; a concordance to the text of the first folio 132 Twelfth night; a concordance to the text of thefirst folio 133 A Vergil concordance 134 Vocabulaire du marxisme 135 The Winter's tale; a concordance to the text of the first folio 136 The word study concordance 132 Twelfth night; a concordance to the text of the first folio 133 A Vergil concordance 134 Vocabulaire du marxisme 135 The Winter's tale; a concordance to the text of the first folio 136 The word study concordance 137 The word study New Testament 139 Young's Analytical concordance to the Bible