ACKNOWLEDGMENTS 
In undertaking a work of this nature there is cause for astonishment at the 
number of helping hands extended all along the way, without which much less 
could be accomplished. I wish to acknowledge the many kinds of assistance 
given me, such as letters of introduction, shelter, transportation, and aid in ob- 
taining local personnel for the work of collecting. The lst will be incomplete 
at best; it could be extended by repeating certain names mentioned by Doctor 
Eigenmann, 1922b, in his narrative of the Irwin Expedition. 
President William Lowe Bryan of Indiana University. whose ready and 
sympathetic assistance was always in the background 
Dr. Henry B. Ward of the University of Illinois who provided for my ex- 
penses on the Irwin Expedition 
Sr. Victor Pezet, Peruvian Consul at New Orleans, and his brother, Peruvian 
Embassador at Washington for introductions and advice 
Mr. W. L. Morkill of the Peruvian Corporation at Lima who provided free 
transportation on railroads and steamship lines for personnel and equipment 
Mr. L. 8. Blaisdell of the Southern Railway of Peru who placed not only 
transportation but the railroad employes at my disposal 
Mr. W. A. Corry of the Southern Railway who gave me the benefit of his 
experience as engineer throughout southern Peru 
Mr. N. B. Roper and other members of the Backus and Johnson Company 
for the use of their mining establishments as headquarters 
Numerous members of the Cerro de Pasco Mining Company’s staffs at Lima, 
Oroya, La Fundicién, and Cerro de Pasco, together with nearly the entire staff 
of the C. de P. Railway 
Mr. J. D. Feehan, General Manager, Central Railway who assisted in working 
out itineraries 
Sr. Victorio Repetto, Husnuco, agent of the Durand interests 
Don Augusto Durand, proprietor of La Prensa, Lima, and of the coca planta- 
tions which were my headquarters for some weeks 
Sr. Ricardo Tello y Devotto, then of Hudnuco, now of Huancayo, for valu- 
able guidance 
Mr. A. §. Kalenborn and Mr. Berrien of Oroya who gave much help with 
collecting 
Sr. Emilio B. Béraun, Administrador of the Hda. San Juan who was my host 
for two weeks 
Sr. Aguiles A. Rubina, Prefect of Dept. of Puno, who arranged my itinerary 
through his provinces 
Sr. Antonio Stroebel, Puno, who provided introductions and loaned me his 
favorite servant, 
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