I made this one for a friend of mine - it was a Christmas gift, though it doesn't look like it. Actually, I think it was also related with this "end of the world" thing that was suppose to happen at the end of the year. Fortunately, it didn't. Still I wanted to draw a comet. And a mill. So it ended up like this - a shepherd looking at the comet which is going to destroy her village and her mill and her world.
I don't know where the sheep are, though. Maybe they ran away when they saw the comet. Or maybe they are watching just behind their shepherd. Sheeps' way of acting and thinking are way beyond my understanding.