Prefatory Note + 

I have been asked to write an explanatory preface to these Memoirs, on the occasion of their first appearance in a single volume. The first volume was begun in October 1926 and completed eighteen months later. The second volume was begun in December 1928 and completed in April 1930. The third volume, completed in January 1936, was written in four months. These details are all I can offer the reader of this volume. From the first word to the last I have tried to make these Memoirs explain themselves as they go along. No further explanations are possible, or, in my opinion, necessary. + 