Good evening, sir." Armitage wheeled about sharply, and as his face came into the full light of the street lamps the stranger stared at him intently.
Armitage was fumbling in his pocket for a coin, but this impertinence caused him to change his mind.

Two policemen were walking slowly toward them, and Armitage, annoyed by the whole incident, walked quickly away.
He was not wholly at ease over the meeting.

The fact that Chauvenet had so promptly put a spy as well as the Servian assassin on his trail quickened his pulse with anger for an instant and then sobered him.
He continued his walk, and paused presently before an array of books in a shop window.

Then some one stopped at his side and he looked up to find the same man he had accosted at the Treasury Building lifting his hat,--an American soldier's campaign hat.

The fellow was an extreme blond, with a smooth-shaven, weather-beaten face, blue eyes and light hair.
"Pardon me! You are mistaken; I am not a spy.