This is a brief sketch of some ecclesiastical ex-libris, written by a priest, the Rev. Father Ingold, of L’Hay, near Paris. The pamphlet contains some facsimile illustrations, of which three are reproductions of exquisite plates designed by M. Claude Thièry, of Nancy. These are the plates of the library of the Oratory of Tours, of the library of the Massillon School, and lastly that of the author, Father Ingold, said to be copied from an original miniature, dated 1466. The Ingold family was of Alsatian origin, and the plate is essentially German in its design, the helmet being surmounted by the characteristic proboscis. [Illustration: BOOK-PLATE OF L’ABBÉ DE BOURBON-ROTHELIN, 1691-1744.] This artist, Claude Thièry, who died in 1895, excelled in small delicate hand-work, full of minute detail, in the manner of Callot; his own ex-libris is an admirable specimen of his style. A facsimile of it is given as a frontispiece to Henri Bouchot’s _Les Ex-Libris_. It represents a fifteenth-century student at work amongst his books, with the inscription: “Cestuy livre est à moy Claude Thiery, ymaigier du moult hault et puissant seigneur Monseigneur François Joseph Empéreur.” [Illustration: BOOK-PLATE OF L’ABBÉ QUARRÉ DE MONAY.] By permission of Father Ingold a few of his illustrations of clerical ex-libris are inserted here, namely, those of Quiqueran de Beaujeu, of Joan de Montmeau, of François Jannart, and the simple little stamp illustrated below, which was used by the priests for marking the books in their own collection in the College of Lyons. Father Ingold complains, however, that in most of the ancient abbeys and monasteries in France the officials who had charge of the books were content simply to inscribe the name of the establishment in MS. on the title-pages, and did not use book-plates. He gives a long list of these inscriptions (all in Latin), some of which contain allusions to interesting historical and bibliographical facts; but as all these entries are _written_ in, they cannot be considered ex-libris in the sense that we attach to the expression. [Illustration: EX BIBLIO PRIVAT A. COLLEGYI ORATOR LUGD ] A work of the greatest utility to those interested in the study of ecclesiastical book-plates is the “Catalogue des Incunables de la Bibliothèque Publique de Besançon,” par Auguste Castan. This was a posthumous book, published in 1893, by J. Dodivers, Grande Rue, Besançon. The author was Conservateur de la Bibliothèque de Besançon, a position which gave him ample opportunities for the pursuit of bibliographical studies, to which he devoted his life. The library of Besançon is particularly rich in unique early printed books, and in MSS. It contains no less than 985 volumes or pamphlets, printed during the fifteenth century, amongst which are examples of the rarest works from the early printing offices of Germany, Italy, France, and Switzerland. [Illustration: BOOK-PLATE OF J. F. JANNART.]