Helen Miller Gould, Mr. Archer M. Huntington, Mr. Frederick E. Hyde,
Mr. D. Willis James, Col. James K. Jones, the Duke of Loubat,
Mr. Peter Marié, Mr. Henry G. Marquand, Mr. F. O. Matthiessen,
Mr. Victor Morawetz, Mr. J. Pierpont Morgan, Mrs. Edwin Parsons,
Mr. Archibald Rogers, Mr. F. Augustus Schermerhorn, Mr. William
C. Schermerhorn, Mr. Charles Stewart Smith, Mr. James Speyer,
Mr. George W. Vanderbilt, Mr. William C. Whitney, of New York;
to Mr. Frederick L. Ames, Mrs. John L. Gardner, Mrs. E. Mason,
Mr. Nathaniel Thayer, Mr. Samuel D. Warren, Dr. Charles G. Weld,
of Boston; to Mr. Allison D. Armour and Mr. Franklin MacVeagh, of
Chicago; to Mrs. Phoebe Hearst, Mr. Frank G. New. lands, Mrs. Abby
M. Parrot, Mr. F. W. Sharon, of San Francisco; to Mr. Adolphus Busch,
of St. Louis; to Mr. Theo. W. Davis, of Newport; and to the late
Mr. E. L. Godkin.

Much valuable support or assistance I have also received from
Mrs. Morris K. Jesup; Mrs. Elizabeth Hobson, of Washington, D. C.;
Miss Joanna Rotch, of Milton, Mass.; Mrs. Henry Draper, of New York;
Mrs. Robert W. Chapin, of Lenox; the late Mr. E. L. Godkin; Professor
Alexander Agassiz; Professor F. W. Putnam, Curator of the American
Museum of Natural History in New York; Dr. S. Weir Mitchell, of
Philadelphia; Professor Franz Boas, Curator of the American Museum of
Natural History in New York; Dr. B. L. Robinson and Dr. M. L. Fernald,
of Harvard University; Professor J. A. Allen and Mr. L. P. Gratacap,
Curators of the American Museum of Natural History.

I am under obligation to Mr. Marshall H. Saville, Curator of the
American Museum of Natural History, especially for the placing of
the names of the ruins of Southern Mexico on one of the maps; to
Miss Alice Fletcher, of Washington, D. C., and Mr. Edwin S. Tracy for