collection of manuscript material; to Henry W. Rankin, of East Northfield, a friend unseen but proved, to whom I owe precious information; to Theodore Flournoy, of Geneva, to Canning Schiller, of Oxford, and to my colleague Benjamin Rand, for documents; to my colleague Dickinson S. Miller, and to my friends, Thomas Wren Ward, of New York, and Wincenty Lutoslawski, late of Krakow, for important suggestions and advice. Finally, to conversations with the lamented Thomas Davidson and to the use of his books, at Glenmore, above Keene Valley, I owe more obligations than I can well express.
Harvard University March, 1902