The Chrysalids thing

Chapter Ten
Anne announces she's going to get married to Alan Ervin. Uncle Axel suggests they kill Anne. The others refuse. Alan is found dead with an arrow through his neck. Anne kills herself. She leaves a note telling everyone about the others but Rachel finds the note first and destroys it.

Chapter Eleven
Petra rides her pony into the woods and is attacked by an animal. She sends out a distress signal and the others are forced to rescue her. Questions are being asked about David and Ro...