I would like to thank the many people who helped in the preparation of this volume. I must thank Dr Patrick Zutshi, Cambridge University Archivist, for his kind permission to edit the volume for publication as well as the staff in the Cambridge University Library Manuscripts Room, Rare Books Room and Official Publications Room, the Seeley History Library at Cambridge, the British Library Manuscripts Room staff, and the staffs of the old Public Record Office at Chancery Lane and the National Archives at Kew. My doctoral supervisor, the late Sir Geoffrey Elton, was a great source of encouragement in plumbing the vast Cecil archives and related state papers, and the administration of the Principal Secretariat. The late Wallace MacCaffrey, a great friend and examiner, was always willing to discuss finer points on Burghley at the tea room of the Library and I miss him very much. The late Patrick Collinson was, in a real sense, the inspiration behind this publication. He saw that the manuscript materials relating to the Cecils’ transfer of power could be better worked through in an edition of these papers than by a traditional monograph. He called the volume the ‘spine’ of the work of father and son.