Edward's death...Poisoning..?

This topic has probably been done to death on here earlier when I was not about..but if anyone wants to discuss further....

According to Crowland:

"....though he was not affected by old age, nor by any known type of disease which would not have seemed easy to cure in a lesser person....."

Well, thanks, that's about as clear as mud isnt it?

I have delved into Richard E Collins' essay for the following opinions:

Virgil: "he fell sick of an unknown disease"
Great Chronicle : gives no cause...(very wise!)
Mancini: Melancholy + a fishing trip upon which he allowed the 'damp cold to strike his vitals"
Hall: Melancholy (again?) and anger
A French writer: Poisoned by some good wine (a gift from the French King)
Molinet: Overcome by heat (in April?!) he refreshed himself with a salad and so died...
de Commines: Apoplexy/stroke...


So what did he die of...Collins, who has a medical background, convincingly dismisses every medical condition that has ever, as far as I know, existed as well as the above theories...

Clifford Brewer in his book The Death of Kings suggests "A chest infection ...progressing to pneumonia'..but surely this would have been easily identified and a fairly common occurrence...

Collins then turns to the Woodvilles odd behaviour as does Annette in Maligned King...and the possibility of the Woodvilles having poisoned Edward begins to look very, very plausible..

When you then take into account Richard's letter to York asking for aid against the Queen and her family etc., "& daily doth intend to murder and utterly destroy us and our cousin...and the old royal blood of this realm"...Who was the "old royal blood"?.Was it Edward's. Had Richard found out the truth about Edward's death? Of course then you get the question...why didnt he make this public if it were so...? Puzzling....as ever...Eileen