13: A Powder For Dragon
Mr. Ages, Nicodemus, Arthur, and Justin come into the library and ask Mrs. Frisby what her problem was. She says her house must be moved to the lee of the stone or Timothy will be crushed to bits. But there is a problem with that too, Dragon, the Fitzgibbon's cat. Mr. Ages made a sleeping powder to put in his food but Mr. Ages broke his leg trying to do that and it's how Jonathan died so Mrs. Frisby was the only one left to do it (The rats were too big to fit through the hole in the floor).