Then the Cat disappeared, and they heard the soft thud of his feet alighting on the roof.

"We must see what he's up to," said Hortense.

Followed by Andy, she ran to the ladder, scrambled to the top, and peered out. The Cat was perched on top of the chimney, looking this way and that.

Hortense ducked her head in order not to be seen.

"What do you suppose he's doing there?" she asked.

"Perhaps something is after him," said Andy.

From below came a slow scratching sound. Some heavy creature with claws was coming up the attic stairs.

"Is it you, Alligator?" Hortense called.

"Where's that Cat?" said Alligator in a determined voice. "I must have him."

"He's on the roof," said Hortense, climbing down. "But what do you want him for?"