Inca Land

Whilst the greatest effort has been made to ensure the quality of this text, due to the historical nature of this content, in some rare cases there may be minor issues with legibility. Some of my story has already been told in Har per's and the National Geographic, to whose editors acknowledgments are due for permission to use the material in its present form. A glance at the Bibliography will show that more than fifty articles and monographs have been published as a result of the Peruvian Expeditions of Yale University and the National Geographic Society. Other reports are still in course of preparation. My own observations are based partly on a study of these monographs and the writings of former travelers, partly on the maps and notes made by my companions, and partly on a study of our Peruvian photographs, a collection now numbering over eleven thousand negatives. An other source of information was the opportunity of frequent conferences with my fellow explorers. One of the great advantages of large expeditions is the bringing to bear on the same problem of minds which have received widely different training.

Some of my story has already been told in Har per's and the National Geographic, to whose editors acknowledgments are due for permission to use the material in its present form. A glance at the Bibliography will show that more than fifty articles and monographs have been published as a result of the Peruvian Expeditions of Yale University and the National Geographic Society. Other reports are still in course of preparation. My own observations are based partly on a study of these monographs and the writings of former travelers, partly on the maps and notes made by my companions, and partly on a study of our Peruvian photographs, a collection now numbering over eleven thousand negatives. An other source of information was the opportunity of frequent conferences with my fellow explorers. One of the great advantages of large expeditions is the bringing to bear on the same problem of minds which have received widely different training.