Léopold Carteret (1873–1948), a Parisian bookseller and publisher, published between 1924 and 1928 Le Trésor du bibliophile romantique et moderne, 1801-1875, in four volumes: the first two describe the first editions of nineteenth-century writers, from Chateaubriand to Zola; the third covers illustrated books; the fourth provides addenda and indexes. The work extends Vicaire, adopting his method in a lighter form, and supplements it with the dealer's experience: Carteret records print runs, papers, the states of the engravings, and the prices realised at sale. A second series, Le Trésor du bibliophile. Livres illustrés modernes, 1875-1945, appeared in five volumes in 1946–1948.
Carteret is cited by volume and page: "Carteret, I, 120" refers to a first edition, "Carteret, III, 529" to an illustrated book. The entry gives the collation, the details of the print run and papers, the description of the wrappers, and, for illustrated books, the number and state of the plates; it guarantees that an edition is described, not that a given copy corresponds to it in every respect, and it is for the bookseller to compare the copy against the description. Carteret is also a witness to the market of the 1920s, whose judgements of taste and price have not aged well.
His limitations are well known: datings taken over from Vicaire without verification, print runs given on the publishers' authority, gaps concerning minor authors and provincial publishing, and a second series more cursory than the first. He is read alongside Vicaire for bibliographical detail, alongside Clouzot for practical points of distinction, and alongside Talvart and Place for authors writing after 1875.
