Papers of Sir William Williams,
- 1-74.
- Sub-fonds
- 1567-1698.
Part of Coedymaen (Group 1) Papers,
Papers of Sir William Williams (1634-1700), speaker of the House of Commons and Secretary-General. Arranged into legal papers, 1620-1693 (1-49), political papers, 1680-1698 (50-65) and miscellaneous papers, 1567-1694 (66-74).