[he makes a sheepish grin like he knows this is a stretch, but.]

None of them name themselves, but... the biggest sign was that several of them sound like they're from Dahut. A lot of them are also addressed to us, in the tone of someone who's far away and thinking of those of us still here.

Plus, a few of us signed our messages with initials, and got back messages that correctly guessed who we were. Arthur was actually the one who brought it to my attention first.