Note on interior card says "P. campanulatus. Examined for NAF - AHS"
L. C. C. Krieger
USA, Pennsylvania, Blue Ridge Summit.
On horse dung by roadside
[Watercolor painting by L. C. C. Krieger of this specimen is available. High-resolution scan of the watercolor is available online at the U-M digital library, "University of Michigan Herbarium, Krieger's Watercolors of Fungi" (http://quod.lib.umich.edu/f/fuwatic?page=index) listed under "Panaeolus retirugis"]