- Barnum's Animals. The Alan and Shirley Brocker Sliker Collection, MSS 314, Special Collections, Michigan State University Libraries. Available at https://lib.msu.edu/sliker/object/8647
- Permission is granted from the copyright owner/holder.
- The front of the trade card features a drawn colored illustration of animals escaping a red, white, and yellow box of animal crackers. The title "Barnum's Animals" is written in red lettering in the top left corner. At the bottom, National Biscuit Company is listed in green and white lettering. The back of the trade card contains a recipe for Prune Shortcake. The recipe entails directions on how to prepare the dish written in blue lettering.