The entrance to a musty, airless wing had once been bricked up. The mortar was crumbling and a few bricks had fallen. Above the arched doorway a sign said Military Archives. On the floor was a fallen metal plaque whose inscription said simply Dead Storage. He kicked the loose bricks down and stepped through. That was it. The place was lightless, except for the daylight filtering through the violated archway. Ross hauled maps and orders and period newspapers and military histories and handbooks into the corridor in armfuls and spread them on the floor. It took only minutes for him to realize that he had his answer. He ran into the street and shouted for the doctor. Together they pored over the papers, occasionally reading aloud choice bits, wonderingly. The simplest statement of the prob