I wish to thank the Rockefeller Archive Center for its generous research, guidance, and permission for quotations. The archive is part of Rockefeller University, which gave me additional information and hospitality at its main campus. In Cleveland, the Cleveland Public Library and Lake View Cemetery provided many hours of help. My further thanks to Historic Hudson Valley, Rockefeller Foundation, Western Reserve Historical Society, British Petroleum, David N. Myers College, Cuyahoga County Archives, Museum of the City of New York, American Museum of Financial History, Bridgeport (Conn.) Public Library, Oakland Cemetery (Freeport, Ill.), Ted Schwarz, Dr. Neal Chandler, Dr. Allan Peskin, Wayne Henderson, Scott Benjamin, W. Clark Miller, Koeppel and Koeppel Real Estate Company, David Rockefeller, and Mr. Rockefeller's associate, Peter J. Johnson. Finally, many thanks to my editor, Nancy Toff, for publishing my first book.