Merrill, Robert H., 1881-1955, “Quetzalcoatl,” Digital Collections, accessed December 6, 2025, https://digitalcollections.library.gvsu.edu/document/50393.
Black and white photograph of two men standing next to a stone wall of the Quetzalcoatl pyramid. Stone walls and carved designs and sculptures are visible around them. The image appears to be double exposed with another image of a rocky hillside or mountain.