ington?"

At the mention of Marjorie Moore's name the change in Peter Dillon's face
was so startling that Barbara was startled. Just now he did not look in
the least like an Irishman. His lips tightened into a fine, cruel line,
his eyes grew almost black and had a queer, Chinese slant to them. It
suddenly dawned on Barbara, that Russians have Asiatic blood in their
veins and are often more like Oriental people than they are like those of
the western world.

But Peter only said carelessly, after he had regained control of his
face: "Miss Moore doesn't like me; and frankly, I don't like her. She
told you she did society work for her newspaper. She does a great deal
more. She is constantly watching at the legations to see if she can spy
on any of their secret information. It is not good form to warn one girl
against another. But if I were you, Miss Thurston, I would take with a
grain of salt any information that Miss Moore might give you."

Barbara answered quietly: "Oh, I don't suppose Miss Moore will tell me
any of her secrets. She does not come to Mr. Hamlin's except on business.
Harriet does not like her."

"Good for Harriet!" Peter muttered to himself. "It may be Harriet,
after all!"

"Barbara Thurston, you and Peter come along this minute," Harriet ordered
unexpectedly. "Don't you know we shall be locked up in Mt. Vernon if we
stay here much longer. Ruth's automobile is already filled and she is
waiting to start. You and Peter are to get into Mr. Meyers' car with me.
We have another hour before sunset. We are going to motor along the river
and have our supper at an inn a few miles from here."

As Peter Dillon ran ahead to join Harriet Hamlin, a small piece of paper
fell out of his pocket. Barbara picked it up and slipped it inside her
coat, intending to hand it back to Mr. Dillon as soon as she had an
opportunity. But there were other things that seemed of more importance
to absorb her attention for the rest of the evening. And Barbara was not
to remember the paper until some time later.

CHAPTER VI

THE ARREST

After eating supper, and spending the evening at an old-fashioned
Southern Inn on the Virginia side of the Potomac River, the two
automobile parties started back to Washington.

Barbara and Peter Dillon occupied seats in the car with Harriet and Mr.
Meyers, Mrs. Wilson, and two Washington girls who had been members of
their party.

As Ruth did not know the roads it was decided that she k