In September, 1908, I left New York as a delegate of the United States Government and of Yale University to the First Pan-American Scientific Congress, held at Santiago, Chile, in December and January, 1908-09. Before attending the Congress I touched at Rio de Janeiro and the principal coast cities of Brazil, crossed the Argentine Republic from Buenos Aires to the Bolivian frontier, rode on mule-back through southern Bolivia, visiting both PotosÍ and Sucre, went by rail from Oruro to Antofagasta, and thence by steamer to Valparaiso. After the Congress I retraced my steps into Bolivia by way of the west coast, Arequipa, and Lake Titicaca. Picking up the overland trail again at Oruro, I continued my journey across Bolivia and Peru, via La Paz, Tiahuanaco, and Cuzco, thence by mules over the old Inca road as far as Huancayo, the present terminus of the Oroya-Lima Railroad. At Abancay I turned aside to explore Choqquequirau, the ruins of an Inca fortress in the valley of the Apurimac; an excursion that could not have been undertaken at all had it not been for the very generous assistance of Hon. J. J. NuÑez, the Prefect of Apurimac, and his zealous aide, Lieutenant Caceres of the Peruvian army. I reached Lima in March, 1909.

The chief interest of the trip lay in its being an exploration of the most historic highway in South America, the old trade route between Lima, PotosÍ, and Buenos Aires. The more difficult parts of this road were used by the Incas and their conqueror Pizarro; by Spanish viceroys, mine owners, and merchants; by the liberating armies of Argentina; and finally by Bolivar and Sucre, who marched and countermarched over it in the last campaigns of the Wars of Independence.

Realizing from previous experience in Venezuela and Colombia that the privilege of travelling in a semi-official capacity would enable me to enjoy unusual opportunities for observation, I made it the chief object of my journey to collect and verify information regarding the South American people, their history, politics, economics, and physical environment. The present volume, however, makes no pretence at containing all I collected or verified. Such a work would be largely a compilation of statistics. The ordinary facts are readily accessible in the current publications of the ably organized Pan-American Bureau in Washington. Nevertheless, I have included some data that seemed likely to prove serviceable to intending travellers.

Grateful acknowledgment for kind assistance freely rendered in many different ways is due to President Villazon of Bolivia, the late President Montt of Chile, and President Leguia of Peru; to Secretary, now Senator, Root and the officials of the Diplomatic and Consular Service; to Professor Rowe and my fellow delegates to the Pan-American Scientific Congress; and particularly to J. Luis Schaefer, Esq., W. S. Eyre, Esq., and their courteous associates of the house of W. R. Grace & Co. Although business houses rarely take the trouble to make the path of the scientist or investigator more comfortable, it would be no easy task to enumerate all the favors that were shown, not only to me, but also to the other members of the American delegation, by Messrs. Grace & Co. and the managers and clerks of their many branches.

Acknowledgments are likewise due to the officials of the Buenos Aires and Rosario Railroad, the Peruvian Corporation, and the Bolivia Railway; and to Colonel A. de Pederneiras, Sr. Amaral Franco, Don Santiago Hutcheon, Sr. C. A. Novoa, Sr. Arturo Pino Toranzo, Dr. Alejandro AyalÁ, Captain Louis Merino of the Chilean army, Don Moises Vargas, Sr. Lopez Chavez, and Messrs. Charles L. Wilson, A. G. Snyder, U. S. Grant Smith, J. B. Beazley, D. S. Iglehart, John Pierce Hope, Rankin Johnson, Rea Hanna, and a host of others who helped to make my journey easier and more profitable.

I desire also to express my gratitude, for unnumbered kindnesses, both to Huntington Smith, who accompanied me during the first part of my journey, and to Clarence Hay, who was my faithful companion on the latter part.

Some parts of the story have already been told in the “American Anthropologist,” the “American Political Science Review,” the “Popular Science Monthly,” the “Bulletin of the American Geographical Society,” the “Records of the Past,” and the “Yale Courant,” to whose editors acknowledgment is due for permission to use the material in its present form.

Hiram Bingham.

Yale University, New Haven, Conn.
20 November, 1910.