“But what has become of the dark woman I saw last night? It was she who left the Barker residence with Deland this morning. By Jove, I have it. Fannie Coyle was the housekeeper. She has been stopping here since her pretended death. I’ll have the entire gang, too, before I quit this trail.”

Chick continued to wait and watch. Twice he telephoned home to communicate with Nick or Patsy, but neither of them had returned, and he decided to continue playing a lone hand.

That afternoon waned and early evening came, and Chick could see from the street that the windows of suite 710 were brightly lighted. He felt reasonably sure that neither of its occupants had departed.

Returning to the hotel office about seven o’clock, he heard the ringing of the telephone bell, and then the voice of the clerk addressing a hallboy, just approaching from a side corridor.

“It’s 710,” called the clerk. “A taxi is wanted.”

“Mullen is at the side door, sir,” replied the hallboy.

“Good enough! Tell him to wait there.”

“All right, sir.”

Chick Carter had pricked up his ears, and his eyes were glowing more brightly.

“A taxi, eh?” he muttered, heading for the side door. “By the rats, in 710, eh? By Jove, here’s my chance. It’s Mullen for mine.”