"So should he," said Mueller. "Sure; I'll explain. I'm on a job for Dr. Horker."

"Spying on me for him, I suppose!" taunted the girl.

"No. Not on you."

"He means on me," said Nick soberly. "You can't blame him, Pat. And perhaps you had better go home; we've finished here. There's nothing more we can do or say."

"Very well," she said, her voice suddenly softer. "In a moment, Nick." She turned to Mueller. "Would you mind telling me why you waited until now to interfere? We've been here two hours, you know."

"Sure I'll tell you. I got no orders to interfere, that's why."

"Then why did you?" queried Pat tartly.

"I didn't until I saw him there"—he nodded at Nick—"put his arms around you. Then I figured, having no orders, it was time to use my own judgment."

"If any!" sniffed the girl. She turned again to Nick; her face softened, became very tender. "Honey," she murmured huskily, "I guess it's good-bye now. I'll be fighting with you; you know that."

"I know that," he echoed, looking down into her eyes. "I'm almost happy, Pat."