I find it an embarrassing task to make acknowledgment to those who have assisted me; the debts that have accumulated since I began are too many to be recorded. I must not neglect to express my grateful remembrance of the hospitality shown to my researches during my various sojourns in England. At the British Museum and at the Public Record Office every facility has been extended to me, and a similar attention was shown to my wants at other less public repositories of books, such as the Society for the Propagation of the Gospel. To Dr. Richard Garnett, the head of the printed book department of the Museum, I owe thanks for many personal attentions. I am also indebted to Mr. E. M. Thompson, keeper of the manuscripts in the museum. The late Mr. W. Noel Sainsbury, of the Public Record Office, was very obliging. I owe most of all to the unfailing kindness of the Right Honorable James Bryce, M. P., who found time, in the midst of his preoccupations as a member of Parliament and his duties in high office, to secure for me access to private stores of historical material. Lord Edmund Fitzmaurice with generous kindness put himself to much trouble to facilitate my examination of the manuscripts at Landsdowne House. I am indebted to Lord Leconsfield for permission to visit Petworth House and read there Percy's Trewe Relacion in the original manuscript. I must ask others in England who befriended my researches to accept a general acknowledgment, but I can not forget their courtesy to a stranger. In common with other students I received polite attentions during my researches in Paris at the Bibliothèque Nationale. In this country I owe much to the librarians of public libraries and their assistants--too much to allow me to specify my obligations to individuals. At the Astor, and at the Lenox, under its more recent management, my debt has been continual for many years. Acknowledgments are due to the officers of the Boston Public Library, the Library of Congress, the Peabody Institute in Baltimore, and the libraries of the New York, the Massachusetts, the Pennsylvania, the Maryland, and the Virginia Historical Societies. To Harvard College Library and to the New York State Library I am specially indebted; from them I have been able to supplement my own collection by borrowing. The Brooklyn Mercantile Library has granted me similar privileges. The New York Mercantile Library, on the other hand, I have not found hospitable to research. To my generous friend Mr. Justin Winsor I owe thanks for many favors. Dr. Thomas Addis Emmet opened his valuable collection to me, and the late Mr. S. L. M. Barlow showed me similar kindness. My friend, Mr. Oscar S. Straus, permitted me to use at my own desk valuable works from his collection. There are others whose friendly attentions can be more fitly recognized in later volumes of this series, and yet others whom I must beg to accept this general but grateful acknowledgment.