"The door! It's closing!"
Already the opening had narrowed to a mere slit. It was too late to retreat.
"Don't lose your nerve," Penny advised, although her own heart was beating at a furious rate. "We'll find some way to open that door."
"Someone may have seen us drive in and closed it deliberately!"
"I don't think so, Susan. It must have closed automatically."
"Anyway, we're prisoners inside this horrible place! We'll starve to death before anyone will suspect we're here!"
"I got you into this and I'll get you out," Penny announced firmly. "There must be some button or lever that opens the door from the inside."
Although the headlights of the roadster illuminated a portion of the large room, many of the corners and crannies remained dark. Taking her flashlight from the pocket of the car, Penny moved cautiously about searching for some means of escape. Susan remained huddled in her seat, too terrified to move.
Penny examined the door, but it would not budge when she threw her weight against it. She could find no lock or catch.
There were several windows high overhead but without a ladder she could not hope to reach them. She was growing more disturbed than she cared to admit, when Susan called to her.