 Sometime around 1900, William Peterson wrote "A Reminiscence of William Peterson" which was later published in the "Yellowstone Interpreter" in 1964.Charles Cook lived to participate in the 50th Anniversary celebration of Yellowstone's creation in 1922.That year he authored the "Reconstructed Diary of the Cook-Folsom Diary", published in the "Haynes Bulletin" in 1922-23.