Merrill, Robert H., 1881-1955, “Lake Gravel Camp from northwest,” Digital Collections, accessed December 8, 2025, https://digitalcollections.library.gvsu.edu/document/49399.
Black and white photograph of camp at Gravel Lake [likely Lac des Gravier]. Taken by Robert Merrill from northwest. Four people can be seen in the background standing next a log cabin. A boat is visible on the shore in the foreground.