Chap. 9-12
In chapters 9-12, Mrs. Frisby goes to visit the rosebush, she goes to the entrance and peers in, then she steps in and walks down their path. When she gets in to the door, there are guards, one named Brutus. Brutus does not approve of her entering the rosebush, so he uses his weapon to move her back. Later she finds Justin and he helps Mrs. Frisby get in. He tells Brutus that it is Mrs. Jonathan Frisby, so she can pass. Justin shows her around the rosebush. Then, Mrs. Frisby hears lots of rats talking about the "plan." She asks what it is and she gets told what the rats' plan is.
Mrs. Frisby and the Rats of NIMH