"When the clouds in autumn crack"

A friend of mine buys stuff at garage sales and sells it online, so when I was decluttering recently I consigned to her a few boxes of books and bric-a-brac. Among the books was my college Shakespeare anthology, which I hadn't opened in years (everything's online now). My friend was about to ship it to the buyer when she found tucked inside a typed three-page essay, "Weather Imagery in The Taming of the Shrew," dated September 1977. I got a B and the completely justified comment from Professor Bowden, "To sum up, this is quite good as far as it goes, but it could go further" [sic].