FYI everyone, I took John's suggestion on the 1930 address changes, and called the Humanities dept at the library. They were really helpful and provided 3 address changes, even tho I'm from out of town and not a library member. They referred me to the Shorewood library for another address, and altho that library didn't have a crossreference for the address change they had some old directories and were able to answer my question. Both libraries were really friendly and helpful. Angela