City Directories

Often people over look these sources of info. They can be very useful in pin pointing dates of death,places of work or exact home address.
With the absence of a 1890 census city directories can be a big help.
Not all smaller towns have them but at times combined with other small towns in the area or even with the county were they are located.
Most public librarys and historical groups have them. Pus they are available online at such sites as ancestry.com.
http://www.distantcousin.com/directories/
http://www.evendon.net/PGHLookups/HomePage.shtml
are just a few sites.
If you know any let others know.