One of Davison Art Center’s most important works – an early 19th century Francisco Goya lithograph – will be shown in a major art exhibit in Boston this fall. The print, a portrait of the printer Cyprien-Charles-Marie Nicolas Gaulon, was made at the end of Goya’s life, between 1825 and 1826, and is one of only two known “first state” copies of the work (the other is in France's Bibliotheque Nationale). Gaulon taught Goya lithography during the artist’s senescent exile in Bordeaux. “It’s a portrait of a friend, the man who taught him this technique, towards the end of his life,"…