Entities
- Wade Park Manor <Cleveland>
- Letter from: 16.1.1948, Cleveland
- Letter from: 20.1.1948, Cleveland
- Letter from: 3.3.1949, Between Detroit and Cleveland
- Letter from: 27.10.1949, Cleveland
- Letter from: 16.6.1950, Cleveland
- Letter from: 19.8.1950, Cleveland
- Letter from: 10.7.1951, Cleveland
- Letter from: 14.9.1951, Cleveland
- Letter from: 8.9.1952, Cleveland
- Wannseebahn <Berlin>
- Letter from: 10.6.1920, Allenstein (Germany)
- War Department <Washington, D.C.>
- Letter from: 12.3.1946, Washington
- War office <Jerusalem>
- Letter from: 3.7.1939, Jerusalem
- Warenhaus Wertheim <Berlin>
- Letter from: 5.11.1917, Charlottenburg (Berlin;Germany)
- Letter from: 6.4.1918, Charlottenburg (Berlin;Germany)
- Letter from: 20.7.1918, Charlottenburg (Berlin;Germany)
- Washington University <Saint Louis, Missouri>
- Letter from: 10.3.1944, Saint Louis
- Letter from: 14.3.1944, Saint Louis
- Wasmuth Buchhandlung <Berlin> [Buchhandlung, Galerie und Verlag]
- Letter from: 7.11.1917, Charlottenburg (Berlin;Germany)
- Wednesday Lunch Club <London>
- Letter from: 12.4.1938-13.4.1938, London (England)
- Weinhaus Rheingold <Berlin>
- Letter from: 14.4.1915, Berlin
- Letter from: 7.11.1917, Charlottenburg (Berlin;Germany)
- Werkstätten [Dresdner Werkstätten für Handwerkskunst?]
- Letter from: 16.7.1918, Pont du Hem
- Western Union Telegraph Company <New York>
- Letter from: 13.10.1945, Highgate, London
- Westminster Theatre <London>
- Letter from: 23.4.1938, London (England)
- Whiteleys Depository <London>
- Letter from: 29.5.1935, Jerusalem
- Letter from: 22.6.1935, Jerusalem
- Letter from: 21.7.1935, Jerusalem
- Letter from: 8.8.1935, Jerusalem
- Letter from: 27.10.1935, Jerusalem
- Letter from: 6.11.1935, Jerusalem
- Letter from: 25.7.1936, London (England)
- Letter from: 7.11.1945, Croton-on-Hudson (N.Y.)
- Letter from: 11.11.1945, San Francisco
- Letter from: 30.4.1947, San Francisco (Calif.)
- Letter from: 2.7.1947, Washington
- Wiener Philharmoniker
- Letter from: 12.8.1936, Salzburg (Austria)
- Wildenstein Gallery <New York>
- Letter from: 30.4.1947, Washington
- William Penn Hotel <Pittsburgh>
- Letter from: 22.10.1924, Pittsburgh
- Wohnbedarf <Zürich>
- Letter from: 17.2.1933, Zurich (Switzerland)
- WQXR <New York>
- Letter from: 13.4.1942, New York (N.Y.)