http://www.gutenberg.org/files/135/135-h/135-h.htm#link2H_4_...
That's the anonymous translation, which I liked just fine (there are modern ones), and can be bought for a buck or two just about anywhere. I'm guessing that Waterloo gets cut in a lot of abridgments, though.
My favorite extract - "the finest word, perhaps, that a Frenchman ever uttered":
http://coldewey.cc/post/19163335604/the-victor-of-waterloo-a...