Merrill, Robert H., 1881-1955, “San Jon 4 Herb Dick's point in place,” Digital Collections, accessed December 6, 2025, https://digitalcollections.library.gvsu.edu/document/49951.
Black and white photograph of an archaeological plot surrounded by tape measurements and marked with the number "4" in the top right corner, in the center of the plot a stone spear or arrow point is visible.