Not many have yet placed bets on who that letter is
from, so let me have a try before the next page is up ...
One possibility is, of course, Reynirs family having gotten wise to where he vanished to, and trying to tell the team to get him back
at once, being a little unclear about how far Finnish Posti is willing to follow our heroes into the Silent World. But that would remain totally insignificant to the plot, so I doubt it.
What about the other families? Onni and Lalli have no close relatives anymore, Taru seems to be the closest, and she's not
just family but a member of the Quandary Quartet. The families of Sigrun and Emil would rather address their concerns to The Quartet if they cannot contact the team directly. That leaves
Mikkels family, but they supposedly are very much
used to him vanishing without a trace for a good while ...
Then the mail could be from The Quartet itself, for a variety of reasons
starting with another job offer. But then again, if Taru can just "
swing by Keuruu" on her trip from Iceland to wherever the newly-founded "expedition agency"'s HQ is, wouldn't they visit
in person, like they did before adv1?
Then there's the Nordic Council, the almost-forgotten
nominal organizer of the first expedition. They're HQed in Iceland post-Rash, so they definitely could get the intel where the team went to lately. And I suppose that the various
national militaries could get it if they really want it, too. Also, a photo of the team - Icelandic newspapers distributed a gazillion copies of
that all across Iceland, if not further.
So, could someone
else have cut the photo out of his newspaper and sent the letter? To try and hire the team to search for his (insert relative or SO here) who went missing in the Silent World the year before, or lately? Well, yes, but how would he know to send that request
to Finland ... ?
... so, in conclusion, my money's on the Nordic Council or a national military, trying to hand some sort of task to the team. And if I were Minna and wanted to stop SSSS at this point, I'd prefer to leave the actual task open and make the letter just a summon to whatever HQ for further discussion/instructions ... but why have the letter appear
at all at this point, then? Could it rather serve to tie up some loose end?
I suppose it could nail down that the team has a future allowing them to stay together and continue to do what
they we love them doing. And the military
definitely wants to do recon missions into the Silent World when a) even some
civilians deem it doable, and b) there's intel about things like murderghosts and attempted cures to be gotten there. So, to sum it up, my guess is that the letter will ask the team to join a military version of the expedition agency (or even
the agency, assuming that the military commandeered it out of The Quartet's hands).