She went to the wardrobe and took down her things. He sat silently watching her as she put them on, a slight frown upon his face. The girl hesitated a moment, then walked straight to his desk and said:

“Of course I cannot stay here a moment after what you have said. But I think you—you meant to be good to me—in your way. Good-bye, Mr. Burthon.”

“Good-bye, Miss Kane.”

His voice was cold and hard. She did not look at him again, but walked out of the office and quietly left the building, so she did not see that the frown had deepened to a scowl, nor hear him mutter:

“Both lost—the girl and the aëroplane! But I’ll have them yet, for the Kanes are too simple to oppose me successfully.”

At three o’clock Orissa surprised Steve by coming into the hangar in her working dress.

“Why, what’s the matter, Ris?” he demanded.

“I’ve left Mr. Burthon,” she said quietly.

“What’s up?”

Orissa thought it unwise to tell her brother all that had transpired.