Nyoka the Jungle Girl #58

In "The Jungle Masquerade," Nyoka discovers a black panther costume in her quarters and learns that Sir Basil has hidden duplicate costumes to create a ruse. When a black panther attack occurs, Nyoka dons the costume and uses it as a disguise, leading to a confrontation where the black panther is shot and killed—but not before Nyoka determines that Sir Basil himself was the real murderer behind the attack.