1Exhibitions%3D%22520%22%20and%20Century%3D%2220th%20Century%22%20and%20Disp_Obj_Type%3D%22Drawing%22%20and%20Sort_Artist%3D%22Porter,%20J.%20Erwin%22J. Erwin PorterPorter, J. ErwinUnited States19081981MaleDrawingOpera Block - Avon23 1/2 x 35 1/8 in. (59.7 x 89.2 cm)...Pastel00DrawingMemorial Art Galleryxxx1975.27575.275 SL175.275DI1