While double-checking the facts for my Buckingham novel (it will be getting another title), I came across this little gem of a letter in the Calendar of State Papers, Milan (online here). The “enclosed copy” refers to an account of the Battle of St. Albans:
22. The Bishop of Novara, Milanese Ambassador at Rome, to Francesco Sforza, Duke of Milan.
From England we have the news which you will see by the enclosed copy. Although it is not good for those who are dead, yet it cannot fail to favour our proceedings, because it will make the French a little more cautious, as during these differences between the English, they had become great and daily became greater.
Rome, the 4th July, 1455.