Machu Picchu grown rapidly. In 1912, 1914 and 1915, Bingham removed thousands of artifacts from Machu Picchu—ceramic vessels, silver statues, jewelry and human bones—and took them to Yale University for further study, supposedly for 18 months. Yale instead kept the artifacts until 2012, arguing that Peru lacked the infrastructure and systems to care for them. Eliane Karp, an anthropologist and wife of former Peruvian President Alejandro Toledo, accused Yale of profiting from Peru's cultural heritage. Many of the articles were exhibited at Yale's Peabody Museum. In 2006, Yale returned some pieces but kept the rest, claiming this was supported by federal case
Secret of the Incas with many of the scenes in "Secret of the Incas" bearing a striking resemblance in tone and structure to scenes in "Raiders of the Lost Ark". Throughout "Secret of the Incas", the main character, Harry Steele, can be seen wearing the "Indiana Jones" outfit: brown leather jacket, fedora, tan pants, an over-the-shoulder bag, and revolver. The character also sometimes wears a light beard, unusual for films of its time, and there is a tomb scene involving a revelatory shaft of light similar to the "Map Room" sequence in "Raiders". "Raiders"' costume designer Deborah Nadoolman Landis noted that the inspiration for