Orra White Hitchcock drawing of five lines of fossil footprints
Orra White Hitchcock drawing of five lines of ornithichnites fossil footprints
Orra White Hitchcock drawing of seven lines of fossil footprints
Orra White Hitchcock drawing of three families of nummulites
Orra White Hitchcock drawing of two lines of ornithichnites fossil footprints
Orra White Hitchcock drawing of woolly mammoth skeleton