View of baboons climbing on rocks at Detroit Zoo. Printed on front: "Baboon rock in Zoological Park, Detroit, Mich., 42." Printed on back: "Baboon rock. Where nature's bad boys frolic and fight and are a never-ending source of amusement. There are no bars or cages to obstruct the views. Pub. by Chaffee & Co., Inc., Detroit, Mich. Tichnor quality views. Reg. U.S. Pat. Off. Made only by Tichnor Bros., Inc., Boston, Mass."
