Herbert E. Gregory: 

The Gravels at Cuzco.  American Journal of Science, XXXVI, No. 211, 15-29, July, 1913.  Illus., map.

The La Paz Gorge.  Ibid., XXXVI, 141-150, August, 1913.  Illus.

A Geographical Sketch of Titicaca, the Island of the Sun.  Bulletin of
American Geographical Society, XLV, 561-575, August, 1913. 4 pl., map.

Geologic Sketch of Titicaca Island and Adjoining Areas.  American Journal of Science, XXXVI, No. 213, 187-213, September, 1913.  Illus., maps.

Geologic Reconnaissance of the Ayusbamba Fossil Beds.  Ibid., XXXVII,
No. 218, 125-140, February, 1914.  Illus., map.

The Rodadero; A Fault Plane of Unusual Aspect.  Ibid., XXXVII, No. 220, 289-298, April, 1914.  Illus.

A Geologic Reconnaissance of the Cuzco Valley.  Ibid., XLI, No. 241, 1-100, January, 1916.  Illus., maps.

Osgood Hardy: 

Cuzco and Apurimac.  Bulletin of American Geographical Society, XLVI,
No. 7, 500-512, 1914.  Illus., map.

The Indians of the Department of Cuzco.  American Anthropologist, XXI, 1-27, January-March, 1919. 9 pl.

Sir Clements Markham: 

Mr. Bingham in Vilcapampa, Geographical Journal, XXXVIII, No. 6, 590-591, Dec. 1911, 1 pl.

C. H. Mathewson: 

A Metallographic Description of Some Ancient Peruvian Bronzes from Machu Picchu.  American Journal of Science, XL, No. 240, 525-602, December, 1915.  Illus., plates.

P. R. Myers: 

Results of Yale Peruvian Expedition of 1911—­Addendum to the Hymenoptera-Ichneumonoidea.  Proceedings of U.S.  National Museum, XLVII, 361-362, 1914.

S. A. Rohwer: 

Results of Yale Peruvian Expedition of 1911—­Hymenoptera, Superfamilies Vespoidea and Sphecoidea.  Proceedings of U.S.  National Museum, XLIV, 439-454, 1913.

Leonhard Stejneger: 

Results of Yale Peruvian Expedition of 1911.  Batrachians and
Reptiles.  Proceedings of U.S.  National Museum, XLV, 541-547, 1913.

Oldfield Thomas: 

Report on the Mammalia Collected by Mr. Edmund Heller during Peruvian Expedition of 1915.  Proceedings of U.S.  National Museum, LVIII, 217-249, 1920. 2 pl.

H. L. Viereck: 

Results of Yale Peruvian Expedition of
1911.  Hymenoptera-Ichneumonoidea.  Proceedings of U.S.  National Museum,
XLIV, 469-470, 1913.

R. S. Williams: 

Peruvian Mosses.  Bulletin of Torrey Botanical Club, XLIII, 323-334,
June, 1916. 4 pl.

NOTES

[1] Many people have asked me how to pronounce Machu Picchu.  Quichua words should always be pronounced as nearly as possible as they are written.  They represent an attempt at phonetic spelling.  If the attempt is made by a Spanish writer, he is always likely to put a silent “h” at the beginning of such words as huilca which is pronounced “weel-ka.”  In the middle of a word “h” is always sounded.  Machu Picchu is pronounced “Mah’-chew Pick’-chew.”  Uiticos is pronounced “Weet’-ee-kos.”  Uilcapampa is pronounced “Weel’-ka-pahm-pah.”  Cuzco is “Koos’-koh.”