Since I never met Walt Whitman I am especially indebted to his friends for the personal details with which they have so generously furnished me: beside those already named, to Mr. and Mrs. J. H. Johnston, Mr. J. Hubley Ashton, Mrs. W. S. Kennedy, Mrs. E. M. Calder, Mr. and Mrs. (Stafford) Browning of Haddonfield (Glendale), Mr. John Fleet of Huntington, Captain Lindell of the Camden Ferry, and to Mr. Peter G. Doyle; but especially to Whitman's surviving executors and my kind friends, Mr. T. B. Harned and Mr. Horace Traubel. To these last, and to Mr. Laurens Maynard, of the firm of Messrs. Small, Maynard & Co., the publishers of the final edition of Whitman's works, I am indebted for generous permission to use and reproduce photographs in their possession. I also beg to make my acknowledgments to Mr. David McKay and Mr. Gutekunst, both of Philadelphia. Helpful suggestions and information have been most kindly given by my American friends, Mr. Edwin Markham, Professor E. H. Griggs, Mr. Ernest Crosby, Dr. George Herron, Professor Rufus M. Jones of Haverford, Mr. C. F. Jenkins of Germantown, and Mr. and Mrs. David Thompson of Washington. Mr. Benjamin D. Hicks of Long Island has repeatedly replied to my various and troublesome inquiries as to the Quaker ancestry of Walt Whitman, and Dr. E. Pardee Bucke has furnished me with an admirable sketch of his father Dr. R. M. Bucke's life and the photograph which I have reproduced. In England also there are many to whom I would here offer my most grateful thanks. And first, to Mr. Edward Carpenter, whose own work has always been my best of guides in the study of Whitman's, and whose records of his interviews with the old poet in Camden have given me more insight into his character than any other words but Whitman's own. He has also read the MS., and aided me by numberless suggestions. Mrs. Bernard Berenson, who for some years enjoyed the old man's friendship, has supplied me with an invaluable picture of his relations with her father, the late Mr. Pearsall Smith, and his family, and has generously lent me various letters in her possession, and permitted me to make reproductions from them. Mr. J. W. Wallace, of the "Bolton group," has allowed me to read and use his manuscript description of a visit to Camden in 1891; and another of the same brotherhood, Dr. J. Johnston, whose admirable account of a similar series of interviews in the preceding year is well known by Whitman students, has supplied me with a photograph of the little Mickle Street house as it then was. To Mr. William M. Rossetti and to Mr. Ernest Rhys I am indebted for valuable suggestions; and for similar help to my friends, Professor W. H. Hudson and Messrs. Arthur Sherwell, B. Kirkman Gray and C. F. Mott. Finally, the book owes much more than I can say to my wife.