like to
know what is. If that Cromwell book is here, I'd like to have a look
at it."

They went into the shop. Titania preceded him down the musty aisle,
and it made Aubrey angry to see the obstinate assurance of her small
shoulders. He was horribly tempted to seize her and shake her. It
annoyed him to see her bright, unconscious girlhood in that dingy vault
of books. "She's as out of place here as--as a Packard ad in the
Liberator" he said to himself.

They stood in the History alcove. "Here it is," she said. "No, it
isn't--that's the History of Frederick the Great."

There was a two-inch gap in the shelf. Cromwell was gone.

"Probably Mr. Mifflin has it somewhere around," said Titania. "It was
there last night."

"Probably nothing," said Aubrey. "I tell you, Weintraub came in and
took it. I saw him. Look here, if you really want to know what I
think, I'll tell you. The War's not over by a long sight. Weintraub's
a German. Carlyle was pro-German--I remember that much from college.
I believe your friend Mifflin is pro-German, too. I've heard some of
his talk!"

Titania faced him with cheeks aflame.

"That'll do for you!" she cried. "Next thing I suppose you'll say
Daddy's pro-German, and me, too! I'd like to see you say that to Mr.
Mifflin himself."

"I will, don't worry," said Aubrey grimly. He knew now that he had put
himself hopelessly in the wrong in Titania's mind, but he refused to
abate his own convictions. With sinking heart he saw her face relieved
against the shelves of faded bindings. Her eyes shone with a deep and
sultry blue, her chin quivered with anger.

"Look here," she said furiously. "Either you or I must leave this
place. If you intend to stay, please call me a taxi."

Aubrey was as angry as she was.

"I'm going," he said. "But you've got to play fair with me. I tell
you on my oath, these two men, Mifflin and Weintraub, are framing
something up. I'm going to get the goods on them and show you. But
you mustn't put them wise that I'm on their track. If you do, of
course, they'll call it off. I don't care what you think of me.
You've got to promise me that."

"I won't promise you ANYTHING," she said, "except never to speak to you
again. I never saw a man like you before--and I've seen a good many."

"I won't leave here until you promise me not to warn them," he
retorted. "What I told you, I said in confidence. They've already
found out where I'm lodging.