I thought <a target=_blank 
href="http://www.nga.gov/fcgi-bin/timage_f?object=56669&image=14282&c=">James 
Jacques Joseph Tissot's <i>Hide and Seek</i></a> was worth noting 
(perhaps for <a target=_blank 
href="http://www.nga.gov/fcgi-bin/tinfo_f?object=56669">the interesting 
background and commentary</a>?), but the room was too dark to photograph 
anything.