"I've cleaned up the place," he remarked, "but you're welcome to stay here and rummage if you want to. I'm sending one of our men back to take possession as soon as I lock up this bird."

"All right. Good luck," nodded Vaux.

Cassidy tipped his derby to Miss Erith, bestowed a friendly grin on
Vaux.

"Come along, old sport!" he said genially to Lauffer; and he walked away with his handcuffed prisoner, whistling "Garryowen."

"Wait!" motioned Vaux to Miss Erith. He went to the stairs, listened to the progress of agent and prey, heard the street-door clash, then hastened back to the lighted dining-room, pulling the "Perfect Cook-Book" from his pocket.

"I found that in the kitchenette," he remarked, laying it before her on the table. "Maybe that's the key?"

"A cook-book!" She smiled, opened it. "Why—why, it's a
DICTIONARY!" she exclaimed excitedly.

"A dictionary!"

"Yes! Look! Stormonth's English Dictionary!"

"By ginger!" he said. "I believe it's the code-book! Where is your cipher letter, Miss Erith!"