“Adolf Hitler’s spy factories have been training spies and saboteurs for years, and every potential saboteur is given practical tests, on carefully selected proving grounds, in the destruction of life and property.”
“The German espionage authorities seem most interested in the number of our convoy ships, the strength of our fleet, the courses of our transoceanic shipping, buoy markings of channels, developments in navigation engines, new protective devices against submarines, performances of new planes and, of course, production figures of all kinds of war materials. One question on every espionage agent’s carefully memorized agenda is: ‘Where are the worst bottlenecks?'”
