Places
- Zürich
- Letter from: 14.7.1925, Saint Moritz (Switzerland)
- Letter from: 24.8.1925, Saint Moritz (Switzerland)
- Letter from: 25.12.1925, Charlottenburg
- Letter from: 13.7.1926, Engstlenalp (Switzerland)
- Letter from: 15.7.1926, Engstlenalp (Switzerland)
- Letter from: 22.7.1928, Charlottenburg
- Letter from: 3.1.1929, Saint Moritz (Switzerland)
- Letter from: 13.7.1930, Zürich
- Letter from: 25.10.1931, Cannes
- Letter from: 29.10.1931, Ajaccio
- Letter from: 31.10.1931, Zurich (Switzerland)
- Letter from: 31.10.1931, Ajaccio
- Letter from: 14.11.1931, Ascona (Switzerland)
- Letter from: 2.6.1932, Zürich
- Letter from: 3.6.1932, Zürich
- Letter from: 6.9.1932, Berlin-Spandau
- Letter from: 11.9.1932, Vevey (Switzerland)
- Letter from: 22.1.1933, Zurich (Switzerland)
- Letter from: 27.1.1933, Cavalière (France)
- Letter from: 15.2.1933, Antibes (France)
- Letter from: 17.2.1933, Zurich (Switzerland)
- Letter from: 18.2.1933, Berlin-Spandau
- Letter from: 18.2.1933, Berlin
- Letter from: 19.2.1933, Antibes (France)
- Letter from: 20.2.1933, Antibes (France)
- Letter from: 23.2.1933, Berlin-Spandau
- Letter from: 13.4.1933, Brüssel
- Letter from: 13.4.1933, Zurich (Switzerland)
- Letter from: 17.4.1933, Comologno (Switzerland)
- Letter from: 21.4.1933, Comologno (Switzerland)
- Letter from: 24.4.1933, Comologno (Switzerland)
- Letter from: 25.4.1933, Comologno (Switzerland)
- Letter from: 1.5.1933, Comologno (Switzerland)
- Letter from: 1.5.1933, Comologno (Switzerland)
- Letter from: 2.5.1933, Brüssel
- Letter from: 29.05.1933 [?], Perpignan (France)
- Letter from: 5.6.1933, Côte d´Azur (France)
- Letter from: 6.6.1933, Cavalière
- Letter from: 1.9.1933, Paris
- Letter from: 27.9.1933-28.9.1933, London (England)
- Letter from: 17.12.1934, Egypt [auf dem Nil]
- Letter from: 25.12.1934, Naples (Italy)
- Letter from: 24.3.1935, London
- Letter from: 27.3.1935, London
- Letter from: 27.3.1935, Zurich (Switzerland)
- Letter from: 30.3.1935, London
- Letter from: 30.3.1935, Zurich (Switzerland)
- Letter from: 9.4.1935, Lausanne (Switzerland)
- Letter from: 25.4.1935, Jerusalem
- Letter from: 14.9.1935, Paris
- Letter from: 10.1.1936, Marseille
- Letter from: 11.1.1936, Marseille
- Letter from: 12.1.1936, Zurich (Switzerland)
- Letter from: 17.1.1936, Zurich (Switzerland)
- Letter from: 18.1.1936, Jerusalem
- Letter from: 18.1.1936, Jerusalem
- Letter from: 20.1.1936, Zurich (Switzerland)
- Letter from: 20.1.1936, Zurich (Switzerland)
- Letter from: 21.1.1936, Zurich (Switzerland)
- Letter from: 21.1.1936, Jerusalem
- Letter from: 23.1.1936, Zurich (Switzerland)
- Letter from: 26.1.1936, Zurich (Switzerland)
- Letter from: 26.1.1936, Jerusalem
- Letter from: 15.02.1936, auf dem Mittelmeer
- Letter from: 15.7.1936, London (England)
- Letter from: 21.7.1936, London (England)
- Letter from: 23.7.1936, London (England)
- Letter from: 30.7.1936, Jerusalem
- Letter from: 31.7.1936, London (England)
- Letter from: 2.8.1936, Jerusalem
- Letter from: 3.8.1936, Zurich (Switzerland)
- Letter from: 8.8.1936, Salzburg (Austria)
- Letter from: 10.8.1936, Jerusalem
- Letter from: 13.8.1936, Jerusalem
- Letter from: 9.8.1937, London (England)
- Letter from: 16.8.1937, London (England)
- Letter from: 17.8.1937, Jerusalem
- Letter from: 17.8.1937, London (England)
- Letter from: 18.8.1937, London (England)
- Letter from: 20.8.1937, London (England)
- Letter from: 21.8.1937, Jerusalem
- Letter from: 24.8.1937, London (England)
- Letter from: 27.8.1937, London (England)
- Letter from: 2.9.1937, Saint Moritz (Switzerland)
- Letter from: 8.9.1937, Jerusalem
- Letter from: 14.4.1938, Trieste
- Letter from: 17.4.1942, San Francisco
- Letter from: 13.11.1947, Saint Louis
- Letter from: 13.11.1947, Saint Louis
- Letter from: 22.02.1950; 19.03.1950, San Francisco (Calif.)
- Letter from: 25.12.1952, San Francisco