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a) Brush, b) brush, pen
1896–1898
Pencil
1907–1908
Charcoal
1924–1925
Pastel, charcoal
1926–1929
1906–1911
Blue carbon paper
1920–1934
Pen, pencil
1930
Pen
1931–1933
Brush
1940–1943
Ca 1915
a, b) Watercolour, charcoal c) Crayon, black
1909
Crayon, multicoloured
1910
Hectograph
1906–1907
Lithograph
1916
1920
Drypoint
1913
1914
1904
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