Inconsistent hyphenation and spelling in the original document have been preserved. Obvious typographical errors have been corrected. A number of these chapters have appeared as separate articles in "The Atlantic Monthly," "The Critic," "The Bookman," "The World's Work," "The Boston Transcript," and "The Evening Post" and "The Commercial Advertiser" of New York. To the editors of these publications thanks for permission to republish are gratefully tendered by…
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