In Secret by Robert W. Chambers, Fiction, Espionage (Paperback)

AMERICAN INTELLIGENCE AT WORK ON THE EVE OF WW I "Excellent work. But -- what is the Great Secret?" There was only one man in America who knew. And he had landed in New York that very morning. At that moment he was standing at the bar of the Hotel Astor, just sober enough to keep from telling everything he knew to the bartenders, and just drunk enough to talk too much in a place where the enemy always listens. Later he sauntered off on slightly unsteady legs to promenade himself in the lobby and Peacock Alley. Small wonder that his life was in terrible, terrible danger.