This is one of those fics that make me wonder why we don't see more of this pairing.
It's a wonderful portrait of two characters, done with that seemingly impossible combination that always makes me squee, economy and detail.
Lupin's lonliness and depression are so authentically presented and palpable--I almost needed a pint myself.
I loved every word, but since I can't quote the whole thing back at you, here are a few lines I particularly loved:
Moody doesn't waste words, but his body language is eloquent. As the weeks pass, Remus learns to read the silences between them. On bad days Moody stares too long into shadows, fingers gripping his tankard, and shoulders hunched. On good days his hands lie open on the table and he meets the gaze of the other patrons, his magical eye skittering from face to face. Moody never invites anyone else to join them. Just love this whole paragraph.
Remus thinks that Moody has always seen more than he lets on. Indeed.
Moody is a man of few words, but he has a hundred varieties of silence. Perhaps one day Remus will enumerate them, give them names, and put together a dictionary of silence. Gah, I wish I'd written that!
The others look bewildered, and Lupin is suddenly furious at them — at their youth and naivety, their ignorance of how hard Moody worked, how much he paid to keep their generation safe. This has the feeling of something Moody would say; it underlines the connection between them so beautifully.