I've run across some excellent online sources that I'd like to share for those with interest in Brooklyn, NY and Cleveland, OH. They are:

1. Map of 1874 Brooklyn (You'll need the MrSid browser plugin to view it):

http://lcweb2.loc.gov/gmd/gmd380/g3804/g3804n/rr003520.sid

2. Map of 1874 Cuyahoga County and Cleveland Ohio (You'll need the DjVu plugin):

http://www.clevelandmemory.org/Titus/TOC.shtml

3. From the Brooklyn Public Library, the newspaper "Brooklyn Daily Eagle" 1841-1902. Every issue is online and text searchable:

http://eagle.brooklynpubliclibrary.org/Archive/skins/BE/about.htm

Greg