Reference missing

There's a story about a faculty party at some university, during which the topic of Velikovsky came up. An astronomer said to the MidEast historian "His ideas about the planets are complete rubbish, but he makes interesting points about the Egyptian historical record." The historian replied that "That's funny—I thought his astronomical ideas were interesting, but his dynastic chronology was junk."

I paraphrase, and I think there were three involved. Does anybody know the original?