On Saturday I had a long talk with Sraffa about his work. It is very interesting and original—but I wonder if his class will understand it when he lectures . . . Sraffa is in so much intellectual ferment and excitement about his ideas since I said that I thought there was something in them that he walks very fast up and down his room all day thinking about them. It is impossible for him to write them down, because as soon as he thinks about them, he has to start walking again.
Keynes (1927)















