Thanks for the welcome all! I appreciate the redirect to Cthulhu by gaslight. I'd love to hear any other recommendations or other resources.

As for London, I'm not completely crazy. I'm going to start with a few key areas for a game I plan on running (some year), leaving the intervening areas undetermined (i.e., several small, accurate maps that are points of interest on a larger, less descript map). As time and need dictates, I'll start filling in new areas, maybe even designing connector areas between the points of interest.

Also, if anyone needs specific objects designed for a map, or if they need historical information on something, I love to help so let me know. I do quite a few designs by request over at dundjinni and I used to contribute to a thread on historical questions and research over at civfanatics.com.