ks. For
pseudonymous books in Italian one must consult the work of Vincenzo
Lancetti, which appeared at Milan, in octavo, 1836, as well as the
'Dizionario di Opere Anonime e Pseudonime di Scrittori Italiani,' by G.
M. (Gaetano de' Conti Melzi), also published at Milan in three octavo
volumes, 1848-59. A supplement, by G. Passano, was issued at Ancona in
1887.

Dibdin's rather sumptuously produced works are perhaps of more interest
than bibliographical value, though his edition (vols. 1-4, 1810-19) of
the 'Typographical Antiquities,' begun by Ames (1749), and augmented by
Herbert (3 vols., 1785-90), is useful, in spite of the fact that it was
never completed. For illustrations of the early printers' devices you
must still have recourse to the 'Bibliographical Decameron,' three large
octavo volumes, published in 1817. For the devices of French printers
there is a more recent work entitled 'Marques Typographiques des
Libraires et Imprimeurs de France, 1470-1600,' by M. Silvestre, which was
printed in two octavo volumes at Paris, 1853-1867. It contains
illustrations of more than 1300 devices. Every year witnesses the
production of these indispensable aids to book-collecting, and the modern
trend of such works is towards a constricted specialism. By this means it
is possible to realise a minuteness and accuracy unobtainable in wider
fields. The 'Bibliografia Aragonesa del Siglo XVI' of Senor Sanchez, a
sumptuous work with illustrations of title-pages, colophons, etc., which
was published in two folio volumes in 1913-14, is a striking example of
this.

There are bibliographies of almost every class of books, and a great
number dealing with the works of individual authors and printers of
renown; but these are in the domain of the specialist. There are certain
works, however, which will be of assistance to the collector in compiling
a list of authorities upon his special subject. Dr. Julius Petzholdt's
'Bibliotheca Bibliographica' was published at Leipzig so long ago as
1866; Sabin's 'Bibliography of Bibliographies' appeared at New York in
1877; while Vallee's 'Bibliographie des Bibliographies' (though neither
very accurate nor complete) was published at Paris, in large octavo, in
1883. A supplement to this last was issued in 1887. For the large number
of bibliographical works which have issued from the press since that date
you must consult Mr. W. P. Courtney's invaluable 'Register of National
Bibliography,' in three volumes