Detective Comics #255
Responding to an urgent call from Professor Hale at the Mechanical Museum of Natural History, Batman and Robin arrive only to find the professor has apparently died at the "hands" of one of the mechanical dinosaurs on exhibit. When they examine the body more closely, they discover the dead man has left them a clue to his killer!
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Responding to an urgent call from Professor Hale at the Mechanical Museum of Natural History, Batman and Robin arrive only to find the professor has apparently died at the "hands" of one of the mechanical dinosaurs on exhibit. When they examine the body more closely, they discover the dead man has left them a clue to his killer!
Plot details indexed by the Grand Comics Database (CC BY-SA).