Since the publication of the first edition of this book two or three readers have pointed out that it needs an index. By the addition of an index, they say, its value as a work of reference would become almost wholly negligible. Impressed by the force of their remarks, I employed expert aid, and the index now printed at the end of the volume is the result. It was prepared by Miss Narcissa Bloom, an honor graduate of the Philander Library School, and it may therefore be relied upon as the flower of modern library science.

E. L. P.