[quote=Polyphemus]
Having done that, I am still unsure. I am sorry to bother you by asking questions about your post, but I would greatly appreciate an answer, solely for my own edification- is Churchill dead?
[/quote]

Very clearly so.

No way you can really recover from a cocktail of toxins such as which William fed him, and a slow exposure to low-dosaged of dimethylmercury, which is pretty much undetectable and you don't know you were poisoned by it until you show the symptoms; by which point it'd be too late. However in the dinner scenario it was not the dimethymercury that got to them.