"It is necessary, Miss Carlton, that you go through the regular lessons, regardless of what you knew beforehand," he answered coldly. "And whatever Mr. Mackay may have shown you—as a friend—has nothing to do with these lessons, so long as I, not he, am your instructor."

"But I want to go up today!" she protested, eagerly.

"It is not our custom to take students up on the first day, Miss Carlton.... Now, have you a notebook and pencil?"

"In my car." She tried to answer naturally, but she was keenly disappointed.

"Then will you please go and get them," he said, seating himself in the cockpit of the plane which he had been using to illustrate his statements.

Obediently, but half-heartedly, Linda started back for the road where her car was parked. She had gone about half-way when she came upon her father, accompanied by Ralph Clavering, dressed like herself, in his riding outfit.

"Hello, Linda!" he cried. "Passed your physical exam, didn't you?"

"Oh, yes," she answered. "So you're really going to learn, too?"

"I most certainly am. And your father has consented to let us take our lessons together. Won't that be fun?"