Master Comics #20 (1941)

One night Mr. H sends two thugs to blow up the Carterville Dam. They do some damage but the dam stays up. At the Daily Blade, working late into the night, City Editor Burton dispatches reporters Holfax and Wyman to go get the story. At Wyman's request, he also calls Pat Gleason to meet Ken out at the dam. The reporters pile into Holfax's car and rush to the crime scene, where emergency repair crews are already at work. There's an accident, and Wyman saves a worker from getting crushed by a falling beam, and when the excitement is over, Wyman notices that Holfax is missing. Ken climbs to the top of the dam to look for Holfax, but instead finds Mr. H, berating his bungling bomb-planters for their failure. Ken quietly listens in as Mr. H sends one thug to fetch him two hand grenades, then Ken runs thru the woods to meet up with Pat, who has brought the Speed Ghost to the scene. Wyman changes into his tuxedo and cape, and soon he and his uniformed chauffeur are sprinting thru the woods back to Mr. H's position. They observe as the thug shows up with the grenades, then Mr. H. directs them to toss the bombs down onto some of the workmen. Out steps the Devil's Dagger, and throws a stiletto right thru one hood's hand, causing him to drop his grenade onto the ground, and it's been armed. In the ensuing fracas, the grenade gets kicked into the reservoir, but Pat gets knocked out, and at the end of it, Mr. H. still has one grenade. While he's waving it around and making threats, the Devil's Dagger knocks it out of his hand with a second thrown dagger, then steps in and punches him out. Under a bald wig and padded suit, Mr. H turns out to be Holfax, the police reporter. The Devil's Dagger and Pat take Holfax back to the Daily Blade office, where he tells Burton the whole story, and ends by revealing, and retiring, his secret identity.