I was also surprised to see the Bubeshko decoration--it almost looks like it was added later. But then I believe that Schindler worked on the Hollyhock House--as the project manager of it, and maybe of the Ennis-Brown house too--two of Wright's textile-block buildings, both done in the early '20s. I think of these as sort of pre-Columbian- or Mayan-inspired--I think some say with American Indian influence, with massing like the Taos pueblo. Anyway, I'm surprised that by the time the Bubeskho was built in the late '30s that Schindler was using the motif, and so prominently. Maybe you're right, and it was something the Bubeshkos wanted.
Gregory Harwell
http://www.gregoryharwell.com/Wright...1920%20009.jpg
The Hollyhock
http://bmac20.files.wordpress.com/20...hould-work.jpg
The Ennis-Brown