The Mill1932 · Etching and aquatint in black on cream wove paperImage/plate: 22.3 × 26.5 cm (8 13/16 × 10 7/16 in.); Sheet: 28.4 × 35.1 cm (11 3/16 × 13 7/8 in.)Art Institute of Chicago
WattsOSHAHOHENSTAUFEN AND THE RECHBERG RUIN1913 · Etching, printed in blackPlate 7 13/16 x 10 3/16" (19.8 x 25.7 cm)Museum of Modern Art
WattsOSMCMAIL COACHES1913 · Etching, aquatint (?) and drypoint, printed in blackPlate 6 15/16 x 5" (17.6 x 12.7 cm)Museum of Modern Art