APPEL, Karel, (Dutch, 1921): Two heads, Gouache, 19 5/8'' x 25 1/8'', signed lower right, pencil #'d lower right verso 1541B, upper left corner verso 8697, adhesive label indicating the date 1964, untitled piece, custom period frame 26 1/2'' x 32''. Acquired at the Philadelphia Museum of Art, 6/11/70 from the Martha Jackson Gallery New York City (label verso #8697).