"A woman brought the advertisement to Fleet Street, sir," he said. "Blake has just telephoned up that he and Lambert are keeping her under observation. He 'phoned earlier that Lady Eileen Meredith had been there."
"Yes, I suppose so. What does the advertisement say?"
"He couldn't tell me on the 'phone. He had to hurry away to look after the woman. It is being sent up by taxicab."
"That's good. By the way, Green, keep half-a-dozen men handy, and be about yourself."
"Very good, sir. Is there anything on?"
"I don't quite know. We may have to go out in a hurry. I'll tell you after we have deciphered the advertisement."
CHAPTER XXXI
It was with an eagerness sternly suppressed that Heldon Foyle took from a messenger the note which he knew contained Grell's advertisement. Although outwardly he was the least emotional of men, he always worked at high tension in the investigation of a case. No astronomer could discover a new comet, no scientist a new element with greater delight than that which animated the square-faced detective while he was working on a case.