[Bowser]

Originally Posted by Hawk

Reddit has done the analysis of the letter Sansa is writing in the last episode, and they have determined based on the info available on the screen that... SPOILER:

Spoiler!

No surprise, it is a letter to Littlefinger saying he had promised to protect her, and now is his chance, so send the army of the vale to winterfell to help them, and she would see that he is rewarded.

I think the only reason for her not to tell Jon was that he'd be pissed she turned away a huge army for personal reasons, and she can't tell him now when she is trying to rectify that mistake. From a show/drama standpoint, it sets things up for Jon and the wildlings to start the battle, then have Littlefinger swoop in and save the day with the Vale army. That seems to be GRRM's goto move on large battles. Tywin and the Tyrells swooped in and save King's Landing from Stannis, and then Stannis swooped in and saved the night's watch from the wildling army.

I wonder if it will also serve as conflict between Jon and Sansa sufficient for Jon to want to go back to the wall and leave Sansa (and hopefully Rickon) with Winterfell?

Interesting theory. Those reddit nerds are usually on top of their shit, so maybe they've nailed it here. The one argument I can think of to make is that a message to Littlefinger will never make it because he is ALREADY on the way after convincing Lord Robyn to send the Vale's armies to help Sansa. We shall see....