"Good. In two hours' time, then."

And Heldon Foyle turned away, dismissing the subject from his mind.
Green had gone upstairs to find how Grant of the Finger-print Department
had progressed in his scrutiny of the finger-prints on the
advertisement. He found his specialist colleague with a big enlargement
of the paper on which the advertisement had been written mounted on
paste-board, and propped up in front of him, side by side with an
enlargement of the prints found on the dagger.

"Any luck?" asked Green.

Grant shifted his magnifying glass to another angle and grunted.

"Can't tell yet," he said irritably. "I've only just started. Go away."

"Sorry I spoke, old chap," said the other. "Don't shoot; I'm going."

Grant rested his chin on one elbow and stared sourly at the intruder.

"Great heavens!" he said. "Isn't it enough to have two of my men ill
when there are four hundred prints to classify, to have three newspaper
reporters and a party of American sociological researchers down on me in
one day, without----"

But Green had fled to the more tranquil quarters on the first floor.

"Mr. Foyle asking for you, sir," said the clerk.

He pulled open the door of the superintendent's room. Foyle had got his
hat and coat on.

"Blake's wired that the woman has taken a ticket for Liverpool," he
said. "He's gone on the same train. Now that's settled, let's see if we
can't hurry Wrington up."

CHAPTER XXXII

In the corner of the first-class carriage farthest away from the
platform, the Princess Petrovska sat with her hands on her lap and a rug
round her knees, glancing idly from under her long eyelashes at the
people thronging the Euston departure platform. Her eyes rested
incuriously now and again upon a couple of men who stood in conversation
by a pile of luggage some distance away, but within eyeshot of the
compartment.

She had some vague recollection of having seen one of the men before,
and though she remained apparently languidly interested in the business
of the platform, she was racking her brains to think who he was or where
she had seen him. It was recently, she was certain. Suddenly she leaned
forward, and her smooth brow contracted in a frown. Yes--she was nearly
certain. He had an overcoat and a silk hat on now, but when she last saw
him he had been a bare-headed, frock-coated clerk in the advertisement
office of the _Daily Wire_. The frown disappeared and she dropped back.
But behind the