At our meeting on December 8, Michael Laurence and I gave a joint presentation on “signed in the plate” illustrated advertising covers from Chicago.  Each of the covers shown that evening had the name of the engraver/printer embedded within the illustration.  While most of these illustrations were printed from wood engravings, many were also prepared through lithography. Michael noted that his collection reflected more than 100 different printers and that Chicago may have been the main center...