"I never heard of such a silly thing," she declared. "Standing all day in the post office! I don't know why your father permits you to play around at being a detective!"

"If you think it's play just try standing in one spot for eight hours!" Penny said indignantly.

"I'd have better sense," Mrs. Gallup retorted. Then she softened. "I know you're tired, Penny. Sit down and rest while I make you a cup of hot chocolate."

With a blissful sigh, Penny sank into an upholstered chair. She was looking at a magazine when the housekeeper returned with a pot of chocolate.

"Here is a letter for you," she mentioned, dropping it into the girl's lap. "It came this afternoon."

Noticing that it was postmarked Belton City, Penny quickly tore it open. The envelope contained a brief note from Amy Coulter, who had written to give her new address.

For a long time after she had finished reading the message, Penny sat staring down at it without being aware of her preoccupation.

"I hope it isn't bad news," Mrs. Gallup said anxiously.

"Oh, no." Penny folded the message and thrust it into her pocket. "I was only thinking."

Her thoughts had not been pleasant. She still liked Amy Coulter despite the girl's strange actions, yet she felt that she could not continue to help her without positive proof of her innocence. If only Amy had explained her connection with George Hoges!