"Napolean said that if I stayed, you might tell them so if you liked," Temeraire said, "and then they might spare you. But I said you would never say such a thing at all, so it was no use; and so you may stop trying to persuade me. I will never stay here, while they try to hang you."
Laurence bowed his head, and felt the justice of it; he did not think Temeraire ought to stay but only wished that he would, and be happy. "You will promise me not to stay forever in the breeding grounds," he said, low. "Not past the New Year, unless they let me visit you in the flesh." He was very certain they would execute him by Michaelmas.
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I thought this ending of the fourth book in the Temeraire series particularly moving. If I had not already read the fifth book, I would probably have cried.