The above was written to me by Allen Ginsberg, on a draft of a poem I'd sent him as a kid. No master of concision himself, oddly, he gave me this and other excellent advice & encouragement. Always kind to younger writers, this is one of countless notes he sent over the years.
Even better is this postcard, sent to Joseph Massey:
“Read W.C. Williams (old poet)…”
“Best take care of little details…”
(From Massey's superb Tumblr, slantedshanty)