First edition. Fourth annual supplement for the two volume original Bibliotheca Bibliografica Italica (1889, 1895), this one for the books that were issued for the year 1900 (Besterman 3220). A three page table describing the format of the catalogue precedes the 392 entries, numbered consecutively with those from previous volumes and supplements. The majority of the volume is devoted to the revised alphabetical indices of subjects and authors that now covers all the volumes and supplements in the series. With the small private book label of H.P.K. (Kraus) affixed to the front pastedown. Corners, tail and fore edge rubbed. Chip in paste paper along border with cloth on rear cover.