The Wood-Elves of Mirkwood apparently drink a lot of wine and the people of Laketown are providing them with it, hence the returning of the barrels via the river.
However, the people of Laketown are obviously only middlemen as they literally live in the middle of a lake and probably earn a living from fishing. Also, I guess they don't have any vineyards nearby as on their north is a mountain where a fire-breathing dragon lives, on their west is a huge dense forest (Mirkwood), in their south a bit of the forest and the river Celduin, while in the east probably barren lands and then further on the Iron mountains.
So, my question is: where did Thranduil buy his wine from?
I'm only interested in canon, ie the books and any letters that Tolkien may have written.
