I wish to express my gratitude to Mr. P. S. O'Hegarty, who was good enough to read and suggest some alterations in the manuscript of a section of the first chapter; to Father T. A. Finlay, S.J., for his great kindness in revising the manuscript, and in assisting me to correct the proofs; and to Mr. Arthur Cox, who also gave me much assistance with the proofs. The index was compiled by Mr. E. A. Phelps, to whom I am much obliged.
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