Sanborn maps in Cincinnati!

I blogged about Sanborn fire insurance maps, a great resource for buildings up close and personal, in May and June. Now the Public Library of Cincinnati and Hamilton County has digitized two volumes with more to come. They're in color, 1904-1917 and 1904-1930. Even if they cover the same area (not a given), the distinction is important because these were working maps and often changes were pasted right over the original version.

While you're there, enjoy their excellent collection of Cincinnati city directories, beginning in 1819 and covering pretty much every year 1849-1895. That kind of close coverage is what researchers need.