After reading more about these exhibitions, I learned that it was an industry of its own. Igorots were brought from the Philippines to America and exhibited from one city to another. A lot of them were also exhibited in Canada and Europe. This practice went on for years and a number of foreign businessmen profited from it.
What's alarming is that very little is known as to what happened to these Igorots once the human exhibits were over.
📷 University of Michigan Bentley Historical Library