[seafarer]

Brazil was an ally - and you'll want to warm up after Rounding the Horn, so you could stop in there. I would not recommend the northern route - even at your most economical submerged speed, you ain't going to make it (especially as it's already October for ya', oh, and the Arctic Ocean is essentially completely uncharted at this time, so you'd almost certainly bump into something, like a submerged mountain, under about 30ft of multi-year sea ice).