Albert Einstein, G. B. Jeffery
1926 · Fair
€25
Plato
1917 · Good
€30
John Cowper Powys
1933 · Very good
€50
José Ortega y Gasset
1915 · Very good
€45
Friedrich Fröbel
1913 · Good
€20
William Kingdon Clifford
1914 · Fair
€35
Auguste Comte
1867 · Fair
€50
Enrico Agostino Morselli
1898 · Very good · NL
€50
Three Initiates
1928 · Good
€20
Friedrich Schiller
1935 · Fair
€20
J. van Lennep
1918 · Good · NL
€35
Rudolf Otto
1929 · Fine
€35
Morris Raphael Cohen
1935 · Fine
€35
Max Scheler
1935 · Good
€20
Louis Couperus
1906 · Very good · NL
€50
Adriaan Pit
1930 · Good · NL
€25
Louis Couperus
1904 · Very good · NL
€25
Rabindranath Tagore
1935 · Good
€30
Adolf Engler
1917 · Good
€25
Robert Flint
1932 · Very good
€40
Gerrit van de Linde
1909 · Fair · NL
€20
Herbert Spencer
1867 · Good
€45
Søren Kierkegaard
1863 · Fair
€45
William De Witt Hyde
1935 · Very good
€25
Peter Willem Hendrik Truyen
1901 · Fair · NL
€15
A. S. Neill
1935 · Very good
€45
Miguel de Unamuno
1935 · Good
€25
Auguste Comte
1930 · Good
€30
Abraham Kuyper
1935 · Very good · NL
€50
Johann Joseph Most
1928 · Good
€20
Carl Gobée
1861 · Very good · NL
€45
Georg Simmel
1902 · Very good
€40
Walter E. Thirring
1906 · Fine
€40
Nederlandse Mycologische Vereniging
1918 · Fair · NL
€15
Eugène Pittard
1926 · Good
€20
Gerhart Hauptmann
1911 · Very good
€25
Roger Eliot Fry
1931 · Very good
€30
Herman Gorter
1935 · Very good · NL
€40
Frederick Soddy
1935 · Fine
€30
Inge, William Ralph
1926 · Fine
€50
Abraham Kuyper
1897 · Fair · NL
€30
Bernard Boedder
1897 · Fair
€40
Jan van Leeuwen
1924 · Very good · NL
€30
William James
1931 · Good
€40
Hilaire Belloc
1929 · Fine
€35
Gerard Visser
1917 · Good · NL
€25
Heinrich Spoerl
1935 · Fair · NL
€25
Rudolf Otto, Otto, Rudolf (Carl Ludwig Rudolf), 1869-1937.
1929 · Fair
€15
J. van Lennep
1911 · Very good · NL
€45
José Ortega y Gasset
1935 · Good
€45
Edwin Emery Slosson
1935 · Very good
€40
Silvanus Phillips Thompson
1935 · Very good
€35
Jan Casper Schreuder
1930 · Good · NL
€45
Judah M. Eisenberg, Walter Greiner
1904 · Good
€40
G. N. Watson
1935 · Good
€20
Ernst Toller
1935 · Good
€35
John Dewey
1901 · Good
€45
Armando Palacio Valdés, Guy Everett Snavely
1919 · Good
€20
P. L. Verhulst
1935 · Fair · NL
€15
Paul Fleming
1865 · Very good · NL
€45