SPECIAL ACKNOWLEDGMENTS FOR ILLUSTRATIONS 



Fig. 28. Photograph by H. L. Tucker, Engineer, Yale Peruvian Expedi- 

 tion of 1911. 



Fig. 43. Photograph by H. L. Tucker. 



Fig. 44. Photograph by Professor Hiram Bingham. 



Figs. 136, 139, 140. Data for] hachured sketch maps, chiefly from topo- 

 graphic sheets by A. H. Bumstead, Topographer to Professor Bingham's 

 Peruvian Expeditions of 1912 and 1914. 



