"Why—I suppose so. But if it is only personal reasons, I think you are making a mistake, Mr. Carlton. Mackay is our most reliable flyer—by far our best instructor. We don't expect to have him here more than a month or so. He's had a good offer from a big company."

Linda was glancing shyly, pleadingly, at her father, but he did not even see her.

"Unfortunately I found this young man's father to be most unreliable—untrustworthy—during the period that I employed him on my ranch. The fact is, we are not yet through with the trouble that he started. So you can understand why I should refuse to trust my daughter to his son. It is an unpleasant but true fact that children inherit their father's weaknesses. I should not have a comfortable minute, being miles away, and knowing that she was in his hands."

"Of coarse I will accept your decision, Mr. Carlton," replied Lieutenant Kingsberry, "and see that your wishes are carried out. I will summon the second ranking instructor—H. B. Taylor."

He called his office boy, a young man learning to fly, and working his way at the same time, and gave the necessary message. A couple of minutes later the man came in, dressed like Ted, but somehow he seemed insignificant to Linda—as if he were the one who was not reliable. She sighed.

Her father remained with the lieutenant and the instructor while she went into the doctor's office for her physical examination. She knew that her eyesight was good, but she felt a little nervous when the doctor examined her heart. It was fluttering so! Suppose all the excitement had been too much for her—and she did not pass! What good would her lovely plane be to her, if she were never allowed to pilot it herself?

But she need not have been alarmed, for she came through with flying colors. Then young Taylor took her over to one of the planes, and began to explain about the joystick, the rudder, the ailerons, and everything else he could think of, in words of one syllable.

Linda glanced at him, frowning. Did he think she was a baby. Or was it because she was a girl that his manner seemed so superior, so condescending? Why, he was wasting a lot of time! Ted would have had her up in the air by this time, perhaps letting her guide the plane herself.

"I am familiar with all these terms, Mr. Taylor," she interrupted. "You see I have been up twice—with Mr. Mackay. And I've read a couple of books."

The young man regarded her haughtily.