Legend of the Nile, 1937, Pastel on cotton cloth mounted on burlap, 69 x 61 cm, Kunstmuseum (Bern)
Southern (Tunisian) Gardens, 1919, Watercolor, 9,5 x 9,5 cm, Collection Heinz Berggruen (Paris)
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Southern Gardens, 1936, Oil on paper, mounted on cardboard, 10 x 12 cm, Collection Normal Granz (Geneva)
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Park of Idols, 1939, Watercolor on blackened paper, 14 x 8 cm, Collection Felix Klee (Bern)
Insula Dulcamara, 1938, Oil on newsprint, mounted on burlap, 31 x 69 cm, Klee Foundation (Bern)
Highway and Byways, 1929, Oil on canvas, 32 x 26 cm, Collection Christoph and Andreas Vowinckel
Embrace, 1939, Paste color, watercolor and oil on paper, 9 x 12 cm, Collection Bernhard Sprengel (Hanover)
Dream City, 1921, Watercolor and oil, 18 x 12 cm, Private Collection (Turin)
Captive, 1940, Oil on burlap, 18 x 17 cm, Collection Mr. and Mrs. Frederick Zimmerman (New York)
Ancient Sound, Abstract on Black, 1925, Oil on cardboard, 15 x 15 cm, Kunstsammlung (Basel)
1914
Remembrance of a Garden, 1914, Watercolor on linen paper mounted on cardboard, 25,2 x 21,5 cm, Kunstsammlung Nordrhein-Westfalen (Dusseldorf)
Red and White Domes, 1914, Watercolor and body color on Japanese, vellum mounted on cardboard, 14,6 x 13,7 cm, Kunstsammlung Nordrhein-Westfalen (Dusseldorf)
Legend of the Nile, 1937, Pastel on cotton cloth mounted on burlap, 69 x 61 cm, Kunstmuseum (Bern)
Southern (Tunisian) Gardens, 1919, Watercolor, 9,5 x 9,5 cm, Collection Heinz Berggruen (Paris).
Southern Gardens, 1936, Oil on paper, mounted on cardboard, 10 x 12 cm, Collection Normal Granz (Geneva). 
Park of Idols, 1939, Watercolor on blackened paper, 14 x 8 cm, Collection Felix Klee (Bern)
Insula Dulcamara, 1938, Oil on newsprint, mounted on burlap, 31 x 69 cm, Klee Foundation (Bern)
Highway and Byways, 1929, Oil on canvas, 32 x 26 cm, Collection Christoph and Andreas Vowinckel
Embrace, 1939, Paste color, watercolor and oil on paper, 9 x 12 cm, Collection Bernhard Sprengel (Hanover)
Dream City, 1921, Watercolor and oil, 18 x 12 cm, Private Collection (Turin)
Captive, 1940, Oil on burlap, 18 x 17 cm, Collection Mr. and Mrs. Frederick Zimmerman (New York) 
Ancient Sound, Abstract on Black, 1925, Oil on cardboard, 15 x 15 cm, Kunstsammlung (Basel)
1914
Remembrance of a Garden, 1914, Watercolor on linen paper mounted on cardboard, 25,2 x 21,5 cm, Kunstsammlung Nordrhein-Westfalen (Dusseldorf)
Red and White Domes, 1914, Watercolor and body color on Japanese, vellum mounted on cardboard, 14,6 x 13,7 cm, Kunstsammlung Nordrhein-Westfalen (Dusseldorf)