FOR access to unpublished letters and documents, or for help in other ways in writing this book, I wish to express my grateful thanks to Lady Allen of Hurtwood, Miss Elizabeth Anscombe, Dr John Baker, Mr Bernard Berenson, Mr H. N. Brailsford, Professor C. D. Broad, Mr Fenner Brockway, Miss Catherine Brown, Mr T. S. Eliot, Professor John K. Fairbank, Professor C. P. FitzGerald, Miss Mary Fletcher, Mr John Fletcher, the Hon R. Gathorne-Hardy, Mrs Mary Agnes Hamilton, Sir Ralph Hawtrey, Dr and Mrs Julian Huxley, Mrs Harold Laski, Professor J. E. Littlewood, Mr and Mrs E. M. H. Lloyd, Mr Ralph Lyon, the Warden of Merton, Professor and Mrs G. E. Moore, Miss Louise Morgan, Mrs Bernard Muscio, Dr Gilbert Murray, Professor E. H. Neville, Madame Thérèse Nicod, Miss J. E. Norton, the Trustees of the Late Lord Passfield and Mrs Webb, Professor W. V. Quine, Mr Anthony Quinton, Miss Diana Russell, Miss Flora Russell, Professor P. Sargant Florence, Dr D. S. Schwayder, Mr James Strachey, Sir Charles and Lady Trevelyan, Mrs R. C. Trevelyan, Sir Stanley Unwin, Mrs Julian Vinogradoff, Sir Ralph Wedgwood, Mr W. H. Werkmeister, Professor Morris Weitz, Professor J. H. C. Whitehead, Mr G. Woledge, and Mr Leonard Woolf.
In particular, my work would have been impossible without the great help and kindness I have received, over a period of several years, from Lord and Lady Russell.
I have had throughout the collaboration in research of my wife, Mary Seaton Wood, but not her concurrence in all my opinions.
Chapters V and VI originated in a series of lectures prepared for the Oxford University Delegacy for Extra-Mural Studies, to whom I should like to make the appropriate acknowledgments.
This book is intended mainly for the general reader. In some cases, however, it has seemed better for those who are not philosophers to pass over passages with technical terms, rather than divert the argument for the lengthy definitions and discussions which would be needed to explain them, and which can be found easily accessible in Russell's own works. Only four chapters are concerned solely with philosophy.
References to sources of quotations will be provided in great detail, together with a bibliography, in my Russell's Philosophy: A Study of its Development.