George Bourne
1935 · Very good
€45
Ernest Thompson Seton
1929 · Fine
€35
W. H. Hudson
1935 · Very good
€25
W. H. Hudson
1935 · Good
€30
Edward Jesse
1862 · Good
€40
W. H. Hudson
1901 · Good
€25
F. Matthias Alexander
1935 · Fine
€35
Arthur Cleveland Bent
1935 · Very good
€25
Edward Carpenter
1906 · Good
€25
Carl Gobée
1861 · Very good · NL
€45
Eadweard Muybridge, University of Pennsylvania
1891 · Good
€35
Walter B. Cannon
1931 · Good
€20
Charles G. D. Roberts
1923 · Very good
€25
Joseph Le Conte
1928 · Very good
€30
Charles Darwin
1919 · Good
€30
Beatrix Potter
1912 · Good
€35
D. Embden
1902 · Very good · NL
€30
B. P. Ponsioen
1935 · Very good · NL
€30
Eugène Pittard
1926 · Good
€20
C. Claus, Carl Friedrich Wilhelm Claus
1883 · Good
€40
Jacinto Benavente
1920 · Good
€20
Mabel Osgood Wright
1903 · Good
€40
Arabella B. Buckley
1876 · Good
€35
Mark F. Boyd
1926 · Very good
€25
L. Bautain
1911 · Good
€45
Alfred Kaestner
1904 · Very good
€35
Arthur Schopenhauer
1912 · Good
€30
Antwerp Edgar Pratt
1910 · Good
€40
John Dewey
1910 · Fine
€30
Arabella B. Buckley
1909 · Good
€20
George Alexander Wilken
1914 · Very good · NL
€40
J. Arthur Thomson
1909 · Fine
€45
Rabindranath Tagore
1917 · Very good
€35
Arthur Schopenhauer
1868 · Good
€40
Archibald Rogers
1926 · Good
€25
Ph Spinhoven, T.K. Bouman
1908 · Very good · NL
€25
Pieter Joseph Cruse
1911 · Fine · NL
€30
Louis Figuier
1884 · Good
€45
H. Newell Martin
1908 · Very good
€35
Hegner, Robert William
1935 · Very good
€45
Pieter Cornelis Boutens
1916 · Very good · NL
€35
Pieter Johannes Veth
1899 · Good · NL
€45
Langdon-Brown, Walter Sir
1909 · Good
€40
Jules Bernard Luys
1909 · Good
€25
Epictetus
1920 · Good
€20
Edwin Checkley
1890 · Good
€50
Charles Darwin
1894 · Good
€45
Thompson, D'Arcy Wentworth
1931 · Fine
€35
George Bernard Shaw
1935 · Very good
€25
Guillaume Groen van Prinsterer
1903 · Fine · NL
€30
Ernst Heinrich Philipp August Haeckel
1903 · Good
€20
Nicolass Muller
1915 · Fine · NL
€35
Jean Marie Antoine Gevers Leuven
1904 · Good · NL
€20
Hilaire Belloc
1935 · Good
€45
Jacques Loeb
1918 · Good
€35
Edward Carpenter
1898 · Good
€45
Gilman Arthur Drew
1921 · Very good
€35
Leslie Brainerd Arey
1924 · Very good
€45
M. Buys
1935 · Good · NL
€25
Ferenc Hutyra
1916 · Good
€40