Morris Raphael Cohen
1935 · Fine
€35
Louis Couturat
1935 · Good
€70
Lewis Carroll
1918 · Very good
€80
Lewis Carroll
1914 · Very good
€25
Ludwig Wittgenstein, Isidoro Reguera Pérez
1935 · Good
€45
René Descartes
1912 · Very good
€85
Edmund Husserl
1913 · Good
€45
Adriaan Pit
1930 · Good · NL
€25
Aristotle
1901 · Good
€70
C. Bruhns
1920 · Very good
€55
A. S. Neill
1933 · Good
€90
Ernst Cassirer
1930 · Good
€30
Alfred North Whitehead, Bertrand Russell
1911 · Very good
€25
Cassius Jackson Keyser
1935 · Good
€50
H. G. Wells
1911 · Very good
€40
Josiah Royce
1914 · Fair
€25
A. S. Neill
1935 · Very good
€45
Josiah Royce
1935 · Very good
€30
Henri Poincaré, Nicolae Sfetcu
1919 · Very good
€100
L. E. J. Brouwer
1909 · Good · NL
€60
Pierre Louÿs
1917 · Fair
€20
Abraham Kuyper
1914 · Fine · NL
€140
Rudolf Otto
1929 · Fine
€35
Lodewijk van Deyssel
1907 · Good · NL
€20
Lodewijk van Deyssel
1923 · Very good · NL
€85
Josiah Royce
1903 · Very good
€65
Annie Salomons
1916 · Good · NL
€30
Louis Couperus
1906 · Very good · NL
€50
Florian Cajori
1907 · Very good
€45
Jules Bernard Luys
1909 · Good
€25
Josiah Royce
1928 · Fine
€125
E. R. Hedrick
1920 · Very good
€60
Edward Sapir
1926 · Good
€40
Yogananda Paramahansa
1931 · Fine
€125
Jacques Loeb
1918 · Good
€35
James Martineau
1935 · Very good
€80
Plato
1916 · Good
€20
R. G. Collingwood
1929 · Good
€35
Mircea Eliade
1923 · Fair
€50
Arthur Schopenhauer
1912 · Good
€30
Josiah Royce
1912 · Very good
€95
Willem Kloos
1902 · Very good · NL
€65
Guillaume Groen van Prinsterer
1903 · Fine · NL
€30
Lucien Poincaré
1929 · Good
€25
Stefan Zweig
1935 · Good
€35
J. J. de Hollander
1921 · Very good · NL
€80
Henri Bergson, Nancy Margaret Paul
1902 · Good
€45
Henri Poincaré
1906 · Very good
€45
T. E. Hulme
1935 · Very good
€25
Frank Thomas Bullen
1935 · Good
€40
P. Wijdenes
1932 · Very good · NL
€60
Jacques Maritain
1921 · Very good
€45
Christine P. Dancey, John Reidy
1935 · Good
€55
Francis Bacon
1930 · Fair
€45
Roscoe Pound
1935 · Fair
€45
James Martineau
1923 · Fine
€40
James Bissett Pratt
1935 · Very good
€70
Nathaniel Lloyd
1935 · Fine
€65
Bertrand Russell
1916 · Good
€80
Benedictus de Spinoza
1909 · Good
€30