Dear Thomas,
I guess you were right; eventually it caught up with me. We've been trapped here for weeks, and nobody's come to rescue us. I don't know if you'll ever get this message, but if you do, then I want to say that I'm sorry. We're making our way back to the caves now, but that puts any chance of rescue behind us. Take care of yourself, and take care of Christian; I know he'll grow up to be a great man, just like you.
Say goodbye to mother for me.
Yours sincerely,
Adam.
P.S. Never come looking for me. They came for us. They'll come for you.