I have absorbed quite a number of web and other sources on slang and put them together into what appears to be the single largest on-line dictionary of Victorian street slang. Take a butcher's!
Historical Directories from the University of Leicester. Searchable directories, as in phone book equivalents. Either select location-London and then sort by date, or select decade-1880s or -1890s and sort by location. Find out where every shop, person, and everything else was. If you find something great, PLEASE put it up here in the Cyclopedia, as very few of us are crazy enough to do this. I mean, even me!
Spin-Offs and Related Games
Lee Short's world-building game, ClayOfTheGods, hosted here at Golden Chain SITF
Lee Short's Crusader States game, StarMoonAndCross, hosted here at Golden Chain SITF
Other
Material will be added here as we come across it in the Cyclopedia or elsewhere. Be sure to check out MapsAndImages.