Charles W. Cushman Photograph Collection http://webapp1.dlib.indiana.edu/cushman/index.jsp
Some photo collecting buf''s webspace I guess... http://home.snafu.de/patzak/
Duke university scans:
William Gedney http://scriptorium.lib.duke.edu/gedney/
Ad*Acces (vintage magazine ads) http://scriptorium.lib.duke.edu/adaccess/
Emergence of Advertising in America: 1850 - 1920 http://scriptorium.lib.duke.edu/eaa/