We move this to some point while they were well underway. Probably right before the opossum attack. Heyoke sees Serinth reading her log book.
Heyoke (awkwardly trying to make conversation): Are you writing today's log?
Serinth doesn't respond.
Heyoke: I thought you weren't able to bring anything with you.
Serinth (still reading through the book): Not writing, reading. I memorize them ahead of time and add them all at once. It beats having to trek back here for each attempt.
Heyoke (understanding): I guess you're getting pretty tired of having to explain yourself.
Serinth (finally looking up, flat): Yes. I am.