In the preparation of this volume the publishers have received from
several houses and authors generous permissions to reprint copyright
material. For this they wish to express their cordial gratitude. In
particular, acknowledgments are due to the Houghton Mifflin Company for
permission to reprint the sketch of Horace Greeley; to Little, Brown &
Co. for permission to reprint passages from "The Life, Letters, and
Journals of Louisa May Alcott"; to Mr. Henry George, Jr., for the
extract from his life of his father; to William H. Rideing for
permission to reprint extracts from his book "Many Celebrities and a
Few Others"; to the Macmillan Company for permission to use passages
from "The Making of an American," by Jacob A. Riis; to Miss Helen
Keller for permission to reprint from "The Story of My Life."