Dave Edmonds (known to many readres from Philosophy Bites, as well as books and his BBC programs) writes:

I am co-writing a book on the Vienna Circle – part biography, part philosophy – and wondered if I can ask for your readers’ help. Many of those linked to the Circle emigrated to the US and lived until the 70s/80s/90s.  If anybody met or has any interesting stories or information about thinkers associated with the Vienna Circle, such as Gustav Bergmann, Rudolf Carnap, Herbert Feigl, Kurt Gödel, Karl Menger and Rose Rand (plus Carl Hempel, W.V.O.Quine and Alfred Tarski), I would love to hear from them.  I can be reached at david.edmonds@bbc.co.uk or @DavidEdmonds100 (on twitter).  Many thanks.