P. de Haan
1932 · Very good · NL
€50
Cassius Jackson Keyser
1935 · Good
€50
Mary Whiton Calkins
1910 · Very good
€35
Santiago Ramón y Cajal, Pedro Pasik
1902 · Good
€35
R. M. Caven
1923 · Good
€35
Walter Crane
1911 · Very good · NL
€25
Stephen Walter Ranson
1933 · Very good
€40
Willem Jan Maria Westerwoudt
1915 · Fine · NL
€40
Clemens Brentano
1894 · Very good
€45
Seneca Egbert
1908 · Good
€30
Augustus Hopkins Strong
1926 · Good
€30
L. Th Mayer
1910 · Good · NL
€25
Arthur A. Noyes
1935 · Good
€20
Lotta Jean Bogert
1935 · Fair
€20
Marcellus Emants
1900 · Very good · NL
€25
Frederick Orpen Bower, Sydney Howard Vines
1903 · Fair
€45
William Chase Stevens
1909 · Good
€20
Abraham Kuyper
1911 · Fine · NL
€30
Nikos Kazantzakis
1901 · Good
€25
H. Newell Martin
1903 · Fine
€40
H. Koffyberg
1924 · Fair · NL
€20
A. Rutgers
1872 · Fair · NL
€50
Garrett Putman Serviss
1907 · Fair
€30
Garrett Putman Serviss
1913 · Good
€35
Vincent L. Milner
1867 · Fair
€30
D. W. Cathell
1906 · Good
€20
Marinus Jan de Wilde
1909 · Fair · NL
€35
Aulnis de Bourouill, Johan baron d'
1880 · Fair · NL
€35
Peter Kropotkin
1910 · Fine
€50
Ernst Cassirer
1930 · Good
€30
H. G. Wells
1911 · Very good
€40
H. Newell Martin
1908 · Very good
€35
Alfred North Whitehead, Bertrand Russell
1911 · Very good
€25
Gaius
1904 · Fair
€40
Samuel Pierpont Langley
1889 · Good
€45
Bertrand Russell
1916 · Fair
€45
Sextus Empiricus.
1887 · Good
€40
Adolf von Harnack
1889 · Fair
€40
Augustin Privat-Deschanel
1903 · Very good
€40
Peter Kropotkin
1925 · Very good
€35
Howell, Thomas
1909 · Very good
€30
Grant Allen
1910 · Good
€40
Herman Heijermans
1932 · Good · NL
€25
Harm Bouwman
1916 · Very good · NL
€30
Stefan Zweig
1935 · Good
€35
Edward Carpenter
1906 · Good
€25
Walter Rauschenbusch
1929 · Very good
€35
John Dewey
1910 · Fine
€30
Eskelhoff Carsjen Gravemeijer
1902 · Good · NL
€30
Annie Salomons
1923 · Very good · NL
€25
Alfred E. Johnson
1927 · Good
€25
Julius Fessler
1934 · Very good · NL
€35
Eliza Laurillard
1891 · Fair · NL
€45
L. A. Bakhuis
1902 · Very good · NL
€45
Richard H. Tawney
1935 · Good
€35
Ron Larson
1906 · Good
€45
Johan de Meester
1919 · Fair · NL
€35
Garrett Putman Serviss
1909 · Good
€45
Jacob Abbott
1864 · Fair
€40
Jacob Van Beek
1921 · Good · NL
€25