I have the preliminary work done, the scale drawing printed out, and my wood form cut and ready to assemble last night.
I found documents showing the building was built in 1930 by James W. O’connor, an architect who had quite a portfolio of work on Long Island estates and other buildings.
There’s documents and photos in the Historic American Building Survey on the Library of Congress site from 1980.
I decided to do an experiment to take up some space with styrofoam to use less clay, as it was I wound up using about 120# of clay, here’s the start of it:
Here’s a copy of the cover page from the Library of Congress about the historic survey conducted on the clinic in 1980, click for the full size version: