I am enjoying reading David Edmonds' The Murder of Professor Schlick: The Rise and Fall of the Vienna Circle, which is interesting in equal measures in its treatment of the rise of fascism in Austria and Germany, the development of the Vienna Circle, and -- of course -- the murder of Schlick. Edmonds' presentation of the philosophical issues that drove the Vienna Circle is especially good. (Here is a link to an earlier discussion of Schlick's murder; link.)
In addition to the narrative, the book contains some very interesting photographs of most of the participants in the Vienna Circle. One of those is this image, captioned "Otto Neurath chatting to Alfred Tarski". The caption does not include information about date or location.
I located a photo taken of that entrance to Emerson Hall just a few years ago:
Here is a version of that image, cropped to roughly the proportions of the 1939 photo.
But one challenge remains: is it possible to identify other people in the 1939 photo? Here is a possibility: I think Quine is one of the people in the photo. Here is Quine as I remember him from 1973: