Places
- Neapel
- Letter from: 21.9.1913, Como;Lake (Italy)
- Letter from: 24.2.1923, An Bord der
- Letter from: 24.2.1923, Brindisi
- Letter from: 25.3.1923, vor Brindisi
- Letter from: 6.12.1934, Cairo (Egypt)
- Letter from: 10.12.1934, Jerusalem
- Letter from: 15.12.1934, Egypt [auf dem Nil]
- Letter from: 17.12.1934, Egypt [auf dem Nil]
- Letter from: 23.12.1934, Jerusalem
- Letter from: 27.12.1934, Jerusalem
- Letter from: 29.12.1934, Milan (Italy)
- Letter from: 30.12.1934, Jerusalem
- Letter from: 3.1.1935, Jerusalem
- Letter from: 3.1.1935, Jerusalem
- Letter from: 15.7.1935, im Flugzeug über Korfu
- Letter from: 1.9.1935, Jerusalem
- Letter from: 27.10.1935, Jerusalem
- New York
- Letter from: 9.10.1924-10.10.1924, an Board
- Letter from: 11.10.1924, New York
- Letter from: 12.10.1924, Charlottenburg (Berlin;Germany)
- Letter from: 16.10.1924, Berlin (Germany)
- Letter from: 16.10.1924, New York
- Letter from: 17.10.1924, New York (N.Y.)
- Letter from: 17.10.1924, New York
- Letter from: 19.10.1924, Buffalo
- Letter from: 22.10.1924, Pittsburgh
- Letter from: 26.10.1924, New York
- Letter from: 29.10.1924, Berlin (Germany)
- Letter from: 31.10.1924, Berlin (Germany)
- Letter from: 1.11.1924, Chicago
- Letter from: 13.11.1924, New York
- Letter from: 17.11.1924, New York
- Letter from: 2.3.1930, Charlottenburg
- Letter from: 12.12.1934, Jerusalem
- Letter from: 17.6.1935, Jerusalem
- Letter from: 11.1.1936, Marseille
- Letter from: 30.8.1937, Jerusalem
- Letter from: 20.8.1941, San Francisco (Calif.)
- Letter from: 7.12.1941, New York (N.Y.)
- Letter from: 17.3.1942, New York (N.Y.)
- Letter from: 19.3.1942, New York (N.Y.)
- Letter from: 21.3.1942, Chicago
- Letter from: 23.3.1942, New York (N.Y.)
- Letter from: 12.4.1942, between Toledo and Chicago
- Letter from: 13.4.1942, New York (N.Y.)
- Letter from: 17.4.1942, New York (N.Y.)
- Letter from: 17.4.1942, San Francisco
- Letter from: 19.4.1942, New York (N.Y.)
- Letter from: 21.4.1942, San Francisco
- Letter from: 22.4.1942, New York (N.Y.)
- Letter from: 27.4.1942, Croton-on-Hudson (N.Y.)
- Letter from: 28.4.1942, Croton-on-Hudson (N.Y.)
- Letter from: 30.4.1942, New York (N.Y.)
- Letter from: 6.3.1944, New York (N.Y.)
- Letter from: 10.3.1944, Saint Louis
- Letter from: 11.3.1944, New York (N.Y.)
- Letter from: 20.3.1944, Detroit
- Letter from: 26.5.1944, New York
- Letter from: 7.1.1945, Chattanooga
- Letter from: 8.1.1945, Florence
- Letter from: 13.10.1945, Highgate, London
- Letter from: 26.10.1945, Croton-on-Hudson (N.Y.)
- Letter from: 31.10.1945, Croton-on-Hudson (N.Y.)
- Letter from: 1.11.1945, San Francisco
- Letter from: 5.11.1945, Croton-on-Hudson (N.Y.)
- Letter from: 7.11.1945, Croton-on-Hudson (N.Y.)
- Letter from: 8.11.1945, Croton-on-Hudson (N.Y.)
- Letter from: 13.11.1945, Croton-on-Hudson (N.Y.)
- Letter from: 15.11.1945, Croton-on-Hudson (N.Y.)
- Letter from: 16.11.1945, San Francisco
- Letter from: 18.11.1945, San Francisco
- Letter from: 19.11.1945, Croton-on-Hudson (N.Y.)
- Letter from: 20.11.1945, Croton-on-Hudson (N.Y.)
- Letter from: 24.11.1945, San Francisco
- Letter from: 27.11.1945, Croton-on-Hudson (N.Y.)
- Letter from: 30.11.1945, Croton-on-Hudson (N.Y.)
- Letter from: 2.12.1945, San Francisco
- Letter from: 4.12.1945, Croton-on-Hudson (N.Y.)
- Letter from: 6.3.1946, San Francisco (Calif.)
- Letter from: 8.3.1946, San Francisco (Calif.)
- Letter from: 9.3.1946, New York
- Letter from: 12.3.1946, Washington
- Letter from: 28.4.1947, New York
- Letter from: 29.4.1947, San Francisco (Calif.)
- Letter from: 30.4.1947, Washington
- Letter from: 30.6.1947, New York
- Letter from: 1.7.1947, Baltimore
- Letter from: 2.7.1947, San Francisco (Calif.)
- Letter from: 2.7.1947, Washington
- Letter from: 4.7.1947, Washington
- Letter from: 5.7.1947, San Francisco (Calif.)
- Letter from: 8.7.1947, New York
- Letter from: 5.11.1947, San Francisco (Calif.)
- Letter from: 9.11.1947, Washington
- Letter from: 9.11.1947, Washington
- Letter from: 9.11.1947, Washington
- Letter from: 9.11.1947, Washington
- Letter from: 13.11.1947, Saint Louis
- Letter from: 22.1.1948, Baltimore
- Letter from: 25.1.1948, San Francisco (Calif.)
- Letter from: 25.1.1948, Washington
- Letter from: 26.1.1948, Washington
- Letter from: o.D. [1949?], San Francisco (Calif.)
- Letter from: 1.3.1949, Grand Rapids
- Letter from: 18.6.1949, Auf dem Flug von San Francisco nach Chicago
- Letter from: 20.6.1949, New York
- Letter from: 30.6.1949, Amenia, N.Y.
- Letter from: 21.00.1950 [21.10.1950?], o.O. [Ojai (Calif.)?]
- Letter from: 23.06.1950 , o.O. [San Francisco?]
- Letter from: 9.1.1950, San Francisco (Calif.)
- Letter from: 27.1.1950, San Francisco (Calif.)
- Letter from: 31.1.1950, Unterwegs zwischen Cleveland und New York
- Letter from: 6.2.1950, San Francisco (Calif.)
- Letter from: 6.2.1950, Chapel Hill
- Letter from: 16.6.1950, San Francisco (Calif.)
- Letter from: 17.6.1950, New York
- Letter from: 15.7.1950, San Francisco
- Letter from: 16.8.1950, San Francisco
- Letter from: 18.8.1950, San Francisco
- Letter from: 22.10.1950, New York
- Letter from: 8.5.1951, New York
- Letter from: 12.5.1951, New York
- Letter from: 14.9.1951, Cleveland
- Letter from: 31.5.1952, Auf dem Flug nach Hawaii
- Letter from: 00.06.1952 [vor dem 3.6.], Honolulu (Hawaii)
- Letter from: 3.9.1952, New York
- Letter from: 5.9.1952, New York
- Letter from: 6.9.1952, San Francisco (Calif.)
- Letter from: 11.9.1952, San Francisco (Calif.)
- Letter from: 14.9.1952, Berkeley (Calif.)
- Letter from: 7.12.1952, Miami
- Letter from: 13.12.1952, Auf dem Flug nach New York
- Letter from: 17.12.1952, New York (N.Y.)
- Letter from: 22.12.1952, New York (N.Y.)
- Letter from: 25.12.1952, San Francisco
- Letter from: 30.12.1952, San Francisco
- Letter from: 5.1.1953, New York (N.Y.)
- Letter from: 11.1.1953, New York (N.Y.)
- Letter from: 19.7.1953, San Francisco (Calif.)
- Letter from: 16.9.1955, Tacoma (Wash.)
- Letter from: 24.9.1955, Toronto
- Nidden
- Letter from: 15.5.1920, Königsberg (Germany)
- Letter from: 3.6.1920, Gilgenburg (Prussia)
- Letter from: 8.6.1920, Gilgenburg (Prussia)
- Letter from: 10.6.1920, Allenstein (Germany)
- Letter from: 13.6.1920, Allenstein (Germany)
- Letter from: 16.6.1920, Allenstein (Germany)
- Letter from: 17.6.1920, Charlottenburg
- Letter from: 17.6.1920, Allenstein (Germany)
- Letter from: 18.6.1920, Allenstein (Germany)
- Letter from: 23.6.1920, Allenstein (Germany)
- Letter from: 24.6.1920, Allenstein (Germany)
- Letter from: 25.6.1920, Allenstein (Germany)
- Letter from: 26.6.1920, Allenstein (Germany)
- Letter from: 26.6.1920, Charlottenburg
- Letter from: 28.6.1920, Rauschen (Germany)
- Letter from: 29.6.1920, Königsberg (Germany)
- Letter from: 30.6.1920, Rauschen (Germany)
- Letter from: 30.6.1920, Charlottenburg
- Letter from: 1.7.1920, Rauschen (Germany)
- Letter from: 2.7.1920, Nidden
- Letter from: 4.7.1920, Nidden
- Letter from: 5.7.1920, Nidden
- Letter from: 6.7.1920, Charlottenburg
- Letter from: 7.7.1920, Nidden (Germany)
- Letter from: 8.7.1920, Charlottenburg
- Letter from: 6.6.1922, St. Alban/ Ammersee
- Letter from: 7.7.1928, Kampen auf Sylt
- Letter from: 12.7.1928, Charlottenburg
- Letter from: 19.9.1932, Sestri Levante (Italy)
- Nürnberg
- Letter from: 14.10.1910, München
- Letter from: 21.10.1910, London (England)
- Letter from: 8.10.1911, Florenz
- Letter from: 26.8.1914, Berlin (Germany)
- Letter from: 24.6.1920, Allenstein (Germany)
- Letter from: 11.7.1926, Charlottenburg
- Letter from: 16.7.1926, Charlottenburg
- Letter from: 25.7.1926, Engstlenalp (Switzerland)
- Letter from: 4.9.1926, Unteruhldingen
- Letter from: 8.9.1926, Stuttgart
- Letter from: 6.7.1927, Herrlingen
- Letter from: 22.7.1928, Charlottenburg
- Letter from: 1.9.1933, Paris
- Letter from: 26.9.1938, Penrhyndeudraet /North Wales
- Letter from: 2.7.1947, Washington