Betty stared hard at Penny. But she quickly masked the fleeting expression of alarm. After thanking her friends again, she turned and disappeared in the direction of the hair drying room.
"Just what is it that upsets that girl so?" Penny said in an undertone to Susan as they went to their own lockers. "She acts as if she's afraid we'll discover something about her."
"Yes, she does. I can't figure it out at all."
The girls quickly dressed but by the time they had dried their hair and were ready for the street, it was long past supper time.
"I had no idea it was so late," Susan declared as they hurried toward the parked automobile. "Mother will be worried for fear something has happened to us."
"You might telephone."
"It would take me ages to find a 'phone. I'll be home in a minute or two now anyway."
It had grown quite dark, but although automobiles had been parked close together near the swimming pool, the girls experienced little difficulty in locating Susan's car. As they came up to it they observed that a garage service truck had drawn up to an automobile only a short distance away. The uniformed garage man was busy changing a wheel.
"Some poor fellow had a flat," Susan said sympathetically. "Strange I didn't pick up the nail instead. My luck must be changing."
Penny had paused to survey the service car more critically. The garage man, aware that he was under scrutiny, gave her a sharp glance. Then abruptly he threw his tools into a bag, jumped into his truck and drove away, leaving his work unfinished.