This project will compile from primary sources a comprehensive and detailed biographical reference work on the 462 (94 bishops; 368 peers) members of the House of Lords from the accession of James I (1603) to the Restoration of Charles II (1660). The primary focus of each entry will be the parliamentary and political activity of the men concerned. The work will be published in two separate stages, the first covering the years down to 1629, the other examining the period 1640-1649. The first phase of the project will be undertaken by the team who worked on the Commons, 1604-29, but the project will also ultimately involve the staff currently working on the Commons, 1640-60, who will begin to work on the later portion of the project once they have completed revision of the 1640-60 articles. The volumes covering 1604-29 are planned for publication in 2019.