Thanks!

Blackstone  Suggérée par pilaster 

The lowercase letters bear some resemblance to Blackstone, which is itself inspired by an old Sanborn fire Map cover… so maybe someone else has made a font, based on the same raw material… or it could just be modified.
http://tile.loc.gov/image-services/jp2.py?data=/service/gmd/gmd385m/g3851m/g3851gm/g01227004/sb00001a.jp2&res=2