“We must hurry,” Connie said, glancing anxiously toward the house. “I think Miss Gordon and Miss Mohr are about ready to start home.”

Hanny inserted the key into the padlock and pulled it open.

“You mustn’t tell anyone—not even the other Brownies,” Hanny warned.

“We promise,” Vevi said impatiently.

Hanny pushed open the door and stepped into the dark room. The other two girls followed quickly behind her.

“I can’t see a thing!” Vevi complained.

“Neither can I,” declared Connie, clinging to her friend’s arm.

“Wait! I will let in a little light,” Hanny said. “But only a little.”

The room in which the children stood was nearly square, with walls scarcely more than ten feet in length. There were no windows, only a small skylight overhead. The latter had been covered with a blanket to keep out the sunshine.

Hanny moved the covering so that a crack of light filtered down.