[57] I am indebted to Johannes Vogt, _Catalogus librorum rariorum_ (5th ed., Frankfurt a.M., 1793, p. 313) for these details. The reference to Groschufius is "Praefat. de Libris rarior. p. 16." This is the _Nova librorum rariorum conlectio, qui vel integri inseruntur, vel adcurate recensentur_ (5 pts.; Halle, 1709-1716). [58] Valerius Andreas, _Bibliotheca Belgica_ (editio renovata; Louvain, 1643), p. 593. [59] For references to the use of Kalcoven's name by the Blaeus see Emil Weller, _Die falschen und fingirten Druckorte_ (Leipzig, 1858), p. v and "Jost Kalcoven," _Serapeum_, XXVIII (1867), 303-304. The subject needs more investigation. [60] For the Latin title see the "Bibliography" below. [61] _Palatium Apollonis ac Palladis, h. e. [hoc est] Descriptio praecipuarum bibliothecarum veteris et novique seculi._ Louis Jacob undertook and completed a book on this subject; see the _Traicté des plus belles bibliothèques_ (Paris, 1644). [62] _Mundus Marianus, hoc est: Specificatio omnium mundi locorum, in quibus B. Virgo Deipara miraculose colitur._ This work and Dudinck's promised _Synopsis bibliothecae Marianae_ were duplicated by Hippolytus Marraccius (1604-1675). His _Bibliotheca Mariana_ (Rome, 1648) filled the place of the _Synopsis_. Marraccius, who gave his life to the service of the Virgin, tried vainly to find Dudinck's books. He said in 1648 of his search for the _Mundus_ and _Synopsis_: "Illa etenim licet ardentissima concupitata, videre adhuc non meruit" (_Bibliotheca Mariana_, p. 813). If Marraccius, whose brother listed one hundred and fifteen works from his pen, published and unpublished, all dealing with the Virgin, could not find Dudinck's books soon after their supposed appearance, we cannot hope to be more successful. The _Mundus Marianus_ is now replaced by E. M. Oettinger, _Iconographia Mariana oder Versuch einer Literatur der wunderthätigen Marienbilder, geordnet nach alphabetischer Reihenfolge der Orte, in welchen sie verehrt werden_ (Leipzig, 1852). Only three fascicles of L. Clugnet, _Bibliographie du culte local de la Vierge Marie. France_ (Paris, 1902-1903) were published. [63] This publication in 1653 or, perhaps more correctly, 1652 explains why Labbé called the _Bibliotheca bibliothecarum_ of 1664 a second edition. This designation confuses A. G. S. Josephson; see his _Bibliographies of Bibliographies_, p. 7. For the details of these publications see Augustin and Aloys de Backer and Carlos Sommervogel, _Bibliothèque de la Compagnie de Jésus_ (nouvelle edition; Brussels, 1893), IV, cols. 1319-1320, No. 68 and cols. 1322-1323, No. 71. [64] This and subsequent references will be found in the _Bibliotheca bibliothecarum_ under the writer's Christian name. The pagination of the editions varies and a page reference would be useful for only one edition. I have usually made no effort to identify the authors and books, since the quotations concern Labbé's bibliographical technique and not the books.