This is one of my most unusual publications. I was asked to do this quite a while ago. I think it has turned out nicely, and they used a most intriguing map from the AGS Library archives which I discovered in 2012, thanks to support from the David Woodward Memorial Fellowship in the History of Cartography. Thanks to Charles Pinck, OSS Society President, for his interest.
Updated 8/5/14 to link to pdf as published.