Room Twenty

...room number Twenty. The ringing stopped as soon as we entered.
"What is the matter now?" Penny asked them.
"Too many animals for a proper house!"
They walked carefully around the edges of the room. We watched with an amusement shared, we think, by the wise old tortoise.
With backwards looks and muttered comments about turtles they left room number Twenty and entered...

...room 5.
...room 27.
...room 1.