[Hacksaw]

I thought it was already "proved" he was slowly poisoned through his wine by examining his hair samples.

[AnAmericanMother]

Nope, that was the tin foil hat crowd who were hoping to prove that Wellington and the British governor had him assassinated. The French started yapping about it almost as soon as he was dead. Make the Brits look bad, y'know.

Everybody knew the man had an ulcer (and yes, that's why he kept his hand in his vest), it got worse and worse, and when he began losing weight rapidly and having constant pain and anemia, everybody knew it had "turned."

Here's the original article: Napoleon Bonaparte's gastric cancer: a clinicopathologic approach to staging, pathogenesis, and etiology

It's a good read, actually, if you're interested in histori/medical detective stories.

The absence of hemorrhages in the heart absolutely rules out arsenic poisoning, according to the article. Trace amounts of arsenic in the hair mean nothing, because of the ferocious patent medicines in general use at the time.