I asked my source. He said that he hadn't talked to Prentice Anderson directly but had been sent a (long) recording of a private interview with Prentice Anderson so it was like talking to the primary source. I asked if he could confirm the different cities and he said that he had to find the CDs that the interview was on and listen to them (apparently it was very long) so I probably won't get a confirmation. Although he could have made a mistake, he did listen to Prentice Anderson so it's probably correct, but again I didn't get a confirmation.