There was a <a target=_blank 
href="http://www.nga.gov/exhibitions/boudininfo.shtm">Eugene Boudin 
special exhibit</a> (no photography).  I noted two paintings in 
particular: <a target=_blank 
href="http://www.nga.gov/fcgi-bin/timage_f?object=61366&image=15569&c="><i>Entrance 
to the Harbor, Le Havre</i></a> and <a target=_blank 
href="http://www.nga.gov/fcgi-bin/timage_f?object=61360&image=15542&c="><i>Festival 
in the Harbor of Honfleur</i></a>.