They take John to Frank's house where the cave under the waterfall has become like a natural igloo. The survivors consist of John, Frank, Newt, Hazel, and H. Lowe Crosby.
John doesn't bother asking how Philip and Julian Castle died because he doesn't want anyone asking him about Mona just yet.
Hazel seems unpleasantly happy all things considered. She dubs their new group—you guessed it—the Swiss Family Robinson.