Published to correct the original Dictionary of national biography published in 63 vols., 1885-1900, and the Supplement published in 3 vols., 1901.

This is the first volume (of what will likely be four volumes) of a comprehensive chronological history of fifteenth century England. It begins in 1397, a necessary prelude to the rise of Henry IV, and carries through to 1509 and the death of Henry VII. The series includes inter-related chronologies of Scotland, Wales, Ireland, France, Burgundy and Brittany. Volume I covers from 1397 and the last few years of the reign of Richard II, through the entire reigns of Henry IV and Henry V, and ends a few months into the reign of Henry VI (1422). In the process, it covers wars, usurpations, land and naval battles, parliaments and great council meetings, and the lives and deaths of many hundreds of prominent English, Welsh, Scottish, Irish, French, Burgundian and Breton persons.

Volumes for 1898-1968 include a directory of publishers.