In Archie Carr’s encyclopedic “Handbook of Turtles: The Turtles of the United States, Canada, and Baja California”, first published in 1952, he quotes favorably and at length the observations of “Mrs. Knowlton” on the behavior of wood turtles (Clemmys insculpta) and box turtles (Terrapene carolina). The source given in the references is: Knowlton, Josphine Gibson.