"He was always saying, 'I wonder what Paul is doing.' When John and I were together, and this is about a week or two before our relationship ended, I remember him saying, 'Do you think I should write with Paul again?' I said, 'Absolutely. You should because you want to. The two of you as solo performers are good, but together you can't be beaten."

Source: Fictional character: Grandmother Lettie Blodgett. A Star Is Born, www.imdb.com. 1937.