Grats JMack.
This was my top vote as well, and very well deserved. I have lots to say on this one, so stay tuned!
This was the first month I was harshly critical on the theme, whereby I excluded a lot of stories immediately because they felt to have subverted the theme by using the letter as a plot point, or just forced one in for the sake of it, when the challenge was to write an actual letter.
I can't quite remember all the stories off-hand, by I do recall thinking JMack's and Nightwrite's were far and away ahead of the pack and some of the best writing I've seen from both participants, where JMack's just edged the primary spot for a few smaller details that made his piece literal perfection.
My last vote was a toss-up between a handful of entries, but Gemcutter's came out on top, where there was an underlying cleverness to the story that I'm sure was entirely accidental, but is something I'll again go into detail on for the benefit of development thoughts come Tuesday when I have time for feedback.
But yeah, a really tough month this, but I was pleasantly surprised with the way in which a lot of people ran with it.