Here are two interviews with Waller. The audio example is from September 23rd of 1943 and the interviewer is Hugh Conover from WABC radio in New York.

Here’s the clip:

The newspaper article below is from July 25, 1943. Murray Schumach interviewed Fats after a performance at the Broadhurst Theatre in New York, and the results were published in the New York Times, just a few months before his untimely death on December 15th.