This series was published from 1904 through 1984 (Besterman 6475--6476). This set is comprised of nine consecutive volumes that cover the years 1910 (the second volume of the series) to 1933, and contain over 29,000 entries. Each volume printed in an edition limited to 400 or 500 copies. Each volume is a register of publications relating to Wales and the Celtic people printed in a single year or over a few years. Ex-library set with markings. The spines of some volumes chipped. All covers irregularly faded and a few are scuffed.