The Mayhem Madchen — John Newton Chance

To enter a house where it is known a bomb has been hidden, ready to go off on the slightest movement, takes courage if a negative common sense. Jonathan Blake, however, thought he could work out just where it would be. But on the trembling threshold of that final discovery, an unknown girl turned up close behind him. She wore an expensive cloak and the next thing that happened was that it got shot full of bullet holes, the bullets being meant for Blake...