One day I went to interview Dan Graham about the legendary John Daniels Gallery in New York, which he ran from 1964 to '65. Right after I arrived, Dan started talking to me about Michel Butor and his fascination with the writer's work back in the 1960s. I merely asked: "And did you ever meet him?" Dan answered: "No. Some people wanted to introduce us, but it never happened." I asked: "And would you like to meet him?" And he said, with his very...