would follow the overthrow of one of the petty despots in Central
America."

"Yet Millard has been away from Washington much, has he not?"

"Most of the time during the last four months. He generally managed
to get over here for one day out of the seven; sometimes two days at a
time."

"I believe the whole matter is becoming rather clear in my mind. I do
not mind telling you, Miss Huston, how I first came to know the
fellow. He was over at our shipyard in Dunhaven, trying to get
employment on the construction of submarine boats. But something in
his manner made us suspect him, and he didn't get near the secrets of
any of our boats."

There was one other thing, however, that Benson felt he would like to
have cleared up. So he inquired:

"How did you know that I was at the United Service Club? Did Millard
know? Did he tell you to go there?"

"He guessed where you might be. He asked me to drive to the club
first; if you were not there, then I was to drive to the Arlington.
Failing to find you at either place, I was to go back to the hotel in
the evening. In the event of my finding you at the hotel I was to see
you in the ladies' parlor. But, oh! What can you think of me, Mr.
Benson, to have come to you on such an errand--on a mission to save a
betrayer of his Flag?"

"You came innocently, Miss Huston; that is all that I can understand.
And your whole attitude, since you discovered the truth, has been that
of a loyal American girl who would crush her heart, even, for her
country's honor."

"It isn't going to be as hard as you think, perhaps," she smiled,
bitterly, "to cast the man out of my heart. The man that I now know
Donald Graves to be never was in my heart. There is no room, there,
for a traitor."

She glanced out of the cab at the scene through which they were passing.
Jack Benson looked at the same time.

"I am terribly uneasy," she confessed. "Perhaps, even now, Mr. Benson,
you had much better leave this carriage and let me go forward alone. I
am a woman, and therefore safe. But I fear--yes, actually fear for
your life when he finds out!"

"Don't be at all uneasy about me, Miss Huston," begged Jack, with cool
confidence. "I have had rather a sturdy training in the art of taking
care of myself."

Though he did not allow the girl to see the motion, Jack felt stealthily
at his right hip pocket. Yes; the loaded revolver was there. Jack did
not believe much in the practice of carryi