Category Events - United States, Amherst (MA) Free with Museum admission; reservations suggested, call 413-559-6336 Join Chief Curator Ellen Keiter for a gallery talk on the special exhibition A Marriage of Artistry: Leo and Diane Dillon. A book signing with Diane Dillon and light reception will take place in the Great Hall following the program. Leo and Diane Dillon, Illustration for The Secret River by Marjorie Kinnan Rawlings, Atheneum Books for Young Readers. Courtesy of Diane Dillon. © 2011 Leo and Diane Dillon.