It was I, Carl Masters, of the secret service, so called, who uttered this exclamation, although not a person of the exclamatory school; and small wonder, for I was standing beneath the dome of the Administration Building, and I had but that hour arrived at the World's Fair. I was not there as a sight-seer, not on pleasure bent, and even those first moments of arrival, I knew well, were not to be wasted. I had come hither straight from the Terminal...