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 transcribing from the graphophone three of the songs rendered in this book, and to Mrs. George S. Bixby for aid in transcribing the native music. Finally I desire to express my appreciation of the untiring services of my private secretary, Mrs. H. E. Hepner.
The upper illustration on page 65 is a reproduction of a photograph kindly furnished me by Mr. Frank H. Chapman, and the illustration in Vol. I., pages 145-146, is made from a photograph acquired through the late Dr. P. Lamborn. The illustration in Vol. II., pages 464-465, I owe to the courtesy of Mr. D. Gabriel Castaños, of Guadalajara.
The coloured illustrations are represented as the objects appear when the colours have been brought out by the application of water.
The maps do not lay claim to an accuracy which, under the circumstances, it was impossible to obtain, but they will, I hope, be found to be an improvement on the existing ones.
Dr. Ales Hrdlicka, who has just returned from the Hyde expedition, informs me that in visiting the western part of Sonora he found pure Opata spoken west of Rio de Sonora and north of Ures, _e.g_., in Tuape.
Wherever dollars and cents are given Mexican currency is meant.
In the Indian Songs II., 10 and 18, I have made an attempt at rendering the native words in English in such a form that the translations could be sung, without, however, deviating from the original.