How does The Chrysalids end?

The final few paragraphs of this novel end where the first
chapter started. If you remember, the novel begins with David's dream of a strange city
with odd flying machines. This example of foreshadowing is fulfilled if you like at the
end of the novel, when David, Rosalind and Petra reach Sealand with the woman who has
taken them away from the Fringes. David begins this final section by asserting a direct
similarity between what he is seeing and his boyhood dreams. However, what is more
fascinating about this city is that Rosalind and David can hear lots and lots of people
just like them, who are able to communicate by telepathy in the same way that they
can:

I was
aware of the engineer in our machine communicating with someone below, but behind that,
as a background to it, there was something new and unknown to me. In terms of sound it
could be not unlike the buzzing of a hive of bees; in terms of light, a suffused
glow.

This is the "happy
ending" of this story. David, Rosalind and Petra have finally reached a place where they
are accepted for who they really are. They need not dissemble or hide their true gifts
any more as they have found a community where others like themselves live and which they
can be a part of. They have found "home".