Of these two catalogues, relating to small collections of early books, the first is remarkable for its very unusual arrangement, which is neither alphabetical nor merely typographical but proceeds on a complicated group-system. The first main group comprises Itahan incunabula, which in turn are divided into : Greek books ; Latin books, theological and literary, medical, legal; Italian books. Then follow French incunabula and German incunabula, again with subdivisions. The second section of the catalogue enumerates the collection of Dutch books as a whole in two main divisions, the second beginning with the originator of de nieuwe drukletter, Hendrik de Lettersnijder of Delft, whose career started in 1497. It was P. Kruitwagen who first called attention to the importance of Hendrik, but we may doubt whether he would unreservedly approve of the use to which Mr. Burger has here put that excellent craftsman. As the whole collection numbers only 119 non-Dutch and 209 Dutch books and the usual short lists under towns and printers are provided, no great harm is done by these bibliographical gymnastics, which seem, however, to have nothing to recommend them. The descriptions themselves give little typographical information beyond references to Hain, &c., but deal at length with the condition and provenance of each copy. Venice, Strasburg, Cologne, and Basel supply the bulk of the non-Dutch books, and there is nothing very remarkable among them. The proportion of medical incunabula, which number 1 De Incunabelen en de nederlandscbe Uitgaven tot 1^40 in de Bibliotbeek der Universiuit van Amsterdam beschreven door C. P. Burger jr. Met facsimiles. Nijhoff, 's Gravenhage, 1919. pp. 44 + 72. De IncunabeUn of Wiegeirukken van de Hoofdbibliotbeek der Stad Antaerpen bibliografuch beschreven door Emm. De Bom en H. Pottmeyer. Nijhoff, 's Gravenhage, 1919. pp. 49.
