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INTRODUCTORY PREFACE TO
DR. WALTER ALLEN KNITTLE'S CONTRIBUTIONS

before the faculty of the Graduate School of the University of Pennsylvania. Professor Henry R. Mueller of Muhlenberg College, whom I am so fortunate to count among my teachers, has given the manuscript the benefit of careful reading. Dr. Dixon Ryon Fox has not only extended to me the advantage of his editorial wisdom, but he has also written the introduction to this book. To him I am deeply grateful.

I must also express my appreciation of the great patience and many courtesies extended to me by the librarians of these institutions: the University of Pennsylvania Library; the Columbia University Library; Library of the College of the University of New York; the Historical Society of Pennsylvania; the Holland Society of New York; the Huntington Library of San Marine, California; the Widener Library of Harvard University; the Yale University Library; the Library of Congress; the Pennsylvania State Library; the Moravian Library at Bethlehem, Pennsylvania; the Morgan Library, New York City; The New York State Library; the English Public Record Office and the British Museum. I wish that I could acknowledge the many others who contributed, but the list would seem endless. To them I express my sincere appreciation.

I am also grateful for a grant-in-aid from the Oberleander Trust Fund of Philadelphia, Pennsylvania (Dr. Wilber K. Thomas, Director), which permitted me to conclude satisfactory my research in Ireland and England. This organization of American citizens also contributed toward the publication of this volume.

The errors, which I hope are few, are necessarily of my own making, The interpretation must be attributed to me only. W. A. Knittie


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