The Mignonette Lady

Published in Pearson's Magazine, November 1912.
Jimmie Calvert was offered a well-paying job in the private sector and was considering seriously taking it. Then a fascinating message gets delivered to his door, the instructions insisting that he rush immediately to the address of a well-known chemist and inventor who has completed a new formula for a revolutionary explosive, "one that he says will put an end to war or prospects of war with this nation or any nation that owns it". It falls to Calvert to be the one to convey that formula from its creator to the government, all without being stopped by foreign agents determined to get hold of it.