CONTENTS List of Texts xiii List of Illustrations xxxv INTRODUCTORY MATERIAL Introduction to Volume 15 xxxix Editorial Method of the Series xcvii Acknowledgments cv Note on the Translation cvii List of Abbreviations cviii Location Symbols cix Descriptive Symbols cxi TEXTS 1 Alphabetical List of Correspondence 831 Chronology 857 Calendar of Abstracts 867 Appendixes 963 Literature Cited 975 Index 1005 Index of Citations 1067