Letters to Jimmy Carter

In the documentary, Louise Brooks: Looking for Lulu, Brooks' longtime friend Bill Klein mentions that the actress wrote letters to the President of the United States. I guessed that the President Klein refers to was Jimmy Carter. Chronoligically speaking, that seemed to make sense. And so, I wrote to Carter's Presidential library to obtain verification of this fact, and hopefully, copies of the letters as well. However, the archivist who wrote back said no letters could be found. . . .