I just found where there are three Books on CBH at the UC Berkley Library. One is a picture presentation of the home in 1934. It can only be used at the UC library. I will be in the Bay Area in the spring and am looking forwards to viewing them. If possible, and I think it is, I will have them scanned to digital format so they can be shared on-line.
I will attach the library’s details to this message.