In his letter, he described Keynes as "the one really great man I ever knew, and for whom I had unbounded admiration. The world will be a very much poorer place without him."
This is quoted in a book that comes out next month that I'm writing a review of. Who said it? If you paste it into Google, you'll find it right away. So if you find the answer that way, please don't post it as a comment. Post it only if you're reasoning your way to it or guessing or a little of both.