Volume II, covering the years 1701 to 1740, appeared in 1969. Biographies of 578 individuals appeared within its pages.
David Hayne was now general editor, having replaced Brown who died suddenly during the preparation of Volume I; Volume X, ranging from 1871 to 1880, was the first volume to be assembled, and it appeared in 1972 with the biographies of 574 people, many of whom were instrumental in the creation of Canada itself. A period of long editorial stability was established as
Francess G. Halpenny, who succeeded Hayne in 1969, would hold the position of general editor for 20 years.
Jean Hamelin, who became directeur adjoint in 1973, The second volume of the 19th century appeared in 1976: Volume IX. Some 524 biographies by 311 contributors ranged from 400 to 12,000 words in length, encompassing the years 1861 to 1870. It was decided then not to include an introductory historical essay as that would be more properly included in a broader summing up of the era in a later volume. That same year, Volume I was reprinted with corrections. and the seventh volume appeared, both in 1982. Volume XI contained the biographies of 586 noteworthy Canadians who died between 1881 and 1890. A new feature was introduced in this volume: indexes by occupation and geography. This new feature was to be incorporated in new volumes and in reprints of previous volumes as well as separate indexes, one of which appeared in 1981 for Volumes I–IV. Volume VI (1821 to 1835) with 479 biographies; Volume VII (1836 to 1850) with 538 biographies. Finally, in 1990, the twelfth volume appeared, completing the 19th century. The 597 biographies of Volume XII (1891 to 1900) brought a total of 6,520 biographies to the project as its first main phase drew to a close,
Volumes on the 20th century Volume XII of the DCB said that the first three volumes of the 20th century were in preparation: Volume XIII (1901–1910); Volume XIV (1911–1918); Volume XV (1919–1925). Severe financial restraints were described and a more "modest" plan was announced, with each volume covering a decade instead of the shorter intervals previously planned for post-1910. An additional volume was said to be in preparation up to the end of 1940. The introduction suggested that the financial and staff pressures were "becoming more acute" The 619 biographies ==Book on Prime Ministers==