My first debt is to Dr. Donald Southgate, who encouraged me to undertake this study of Castlereagh. Professor Asa Briggs very kindly read the whole typescript, and made many valuable suggestions. The style and format of the early chapters were greatly improved by Professor D. F. Macdonald, who throughout has taken an active and kindly interest in this project. I am heavily indebted to the library staff of Queen's College, Dundee, in the University of St. Andrews, and to the very efficient Inter-Library Loan Service. I have endeavoured in the footnotes and bibliography to acknowledge my debt to the many scholars who have laboured on the late eighteenth and early nineteenth centuries, and whose work throws light on the career of Castlereagh. Any academic merit the present study possesses is essentially due to them, and I can only hope that they will feel that this biography represents a useful synthesis not unworthy of their efforts. Any omissions in acknowledgement I trust they will forgive. My wife has nobly undertaken much of the mechanical work associated with this book, including the Index, and has, as always, proved a severe and invaluable critic, especially in matters of style. To the errors and omissions alone can I lay exclusive claim.
Queen's College, Dundee
C. J. B.