Detective Comics #87

In "The Man of a Thousand Umbrellas," Bruce and Dick adopt the guise of umbrella repairmen to lure the Penguin into the open—only for him to turn the tables with a twist that catches them off guard. As he sets up shop and begins secretly embedding radio devices in umbrellas to control his gang, the duo must unravel his new scheme before it’s too late. Written by Joseph Greene and illustrated with sharp, expressive detail by Dick Sprang—whose work defines the cover and interior—this 1944 classic showcases a clever, gadget-driven mystery from the early days of the Batman mythos.