“They wait for one more guest,” Mademoiselle Celaire announced.

“One more guest! Do you know who it is?”

“No idea,” she answered. “One would imagine that it was some one of importance. Are you any wiser than when you came, dear master?” she added, under her breath.

“Not a whit,” he replied, promptly.

She took out her fan and waved it slowly in front of her face.

“Yet you must discover what it all means to-night or not at all,” she whispered. “The dear Andrea has intimated to me most delicately that another escort would be more acceptable if I should honor him again.”

“That helps,” he murmured. “See, our last guest arrives.”

A tall,—spare-looking man was just being announced. They heard his name as Andrea presented him to a companion—

“Colonel Mayson!”

Mademoiselle Celaire saw a gleam in her companion’s eyes.