OK, I checked the library today and found out more about the book I was mentioning. It is called "Wright's Street Guide Supplement, 1930." It is 227 pages long and appears to give both the old and new addresses for every address in Milwaukee at that time. It would be a lot to put in a database, but even some of the information would be useful if we could compile it. I also noticed that the last Wright directory the library had was for 1992 and after that, they started carrying Polk directories. I looked inside that last Wright directory and found that it was produced by Polk. So, I have contacted Polk to find out if there are still any copies of the 1930 supplement available and/or if we could put the information into a database, if the copyright has expired. I will let you know what I hear back from them. mrf