a little white but steady.
"You may call me what you like," he said in a low voice. "Spy, if you
will. Believe me or not, I have acted for the best, for you and for
Grell. You once called me a murderer--with what justification you now
know. Are you so ready to judge hastily again?"

If he had hoped to move her from her gust of passion, he quickly learned
his mistake. Her lips curled in contempt, and, drawing her skirts aside
as she passed him as though a touch might contaminate her, she swept to
the doorway. For one instant she stood posed.

"You call yourself a spy. It is a good name. For a police spy there is
no room in this house."

With that she was gone. The man had flushed under the biting contempt in
her voice and words, and now stood for a little with hands tightly
clenched, gazing after her. He felt that, from her point of view at
least, there was some truth in her words. He was--whatever his
motives--a police spy. And yet he was but concerned to clear up the
horrible tangle in which his friend and the girl had become involved.

He did not know that he was watched from behind the curtains as he
walked blindly into the street. Eileen, with lips firmly set and face
tense, was concealed behind curtains. No sooner had he gone than she
hurriedly dressed herself and ordered an electric brougham. She had come
to believe that her lover's safety depended on her actions that day.
Foyle knew the secret of the cipher, and Grell's advertisement told her
that he intended communicating something to her by that method the next
day. At all costs she must prevent him betraying himself.

Only one course occurred to her. She must go to the office of the _Daily
Wire_ and prevent his advertisement from appearing. How she was to do it
she had not the slightest idea. That she left for later reflection.

The car rolled smoothly towards Fleet Street, but no inspiration came to
her. She alighted at the advertisement office, with its plate glass and
gilded letters, and was attended by an obsequious clerk. Outwardly calm,
but with her heart beating quickly beneath her furs, she put her inquiry
to a sleek-haired clerk. He was polite but firm. It was quite possible
that such an advertisement as she mentioned had been sent for insertion
the following day, and again it might not. In any case he was forbidden
to give any information. It would be quite out of the question to stop
any advertisement unless she held the receipt.

"But if th