Charles Darwin
1931 · Good
€55
George Brant Bridgman
1920 · Very good
€45
Mrs. Mary Martha (Butt) Sherwood
1847 · Very good
€95
Gerhardus Havingha
1744 · Good · NL
€350
Sir William Chambers, Joseph Gwilt
1791 · Good
€495
Arthur Schopenhauer
1868 · Good
€40
Euclid
1585 · Very good
€565
Patrick Geddes
1903 · Good
€70
Felix Klein
1926 · Very good
€35
Simon Newcomb
1903 · Good
€45
Grant Allen
1897 · Good
€80
J. H. de Groot
1924 · Good · NL
€40
Howard A. Kelly
1899 · Very good
€45
George MacDonald
1893 · Good
€60
Hessel Mozes Duparc
1843 · Good · NL
€85
William Leybourn, Richard Sault
1696 · Good
€1,050
Charles Darwin
1881 · Fair
€95
Johann Hermann Knoop
1824 · Very good · NL
€295
William Houston Greene
1884 · Very good
€80
Asa Gray
1889 · Very good
€115
Johann Wolfgang von Goethe
1833 · Good
€210
Elizabeth Grinnell
1905 · Fine
€85
A. Pierson
1875 · Very good · NL
€140
John Joseph Griffin
1832 · Good
€225
F. Matthias Alexander
1935 · Fine
€35
Elijah H. Burritt
1866 · Good
€60
Mary Somerville
1863 · Good
€170
John Lindley
1846 · Fair
€145
J. C. Stobart
1929 · Fair
€50
Daniel Webster
1854 · Good
€150
M.E. Schlesinger
1919 · Very good
€70
Harm Bouwman
1916 · Very good · NL
€30
Hannah Whitall Smith
1893 · Good
€105
George Fownes
1848 · Very good
€200
Jeremiah Day
1814 · Good
€140
Howell, Thomas
1909 · Very good
€30
Stijn Streuvels
1912 · Fair · NL
€15
Stijn Streuvels
1912 · Good · NL
€65
William Cecil Dampier
1930 · Very good
€60
Johannes Kepler
1616 · Fair
€1,400
George Campbell
1778 · Fair
€130
Asa Gray
1881 · Good
€65
Grenville Kleiser
1911 · Very good
€65
Ebenezer Cunningham
1921 · Very good
€70
Iamblichus, L. Deubner
1746 · Good
€250
Martín Cortés
1570 · Good
€745
Patrick Fraser Tytler
1847 · Good
€225
Ernst Troeltsch
1916 · Very good
€55
Immanuel Kant, Kant
1816 · Very good
€155
Immanuel Kant
1801 · Good
€95
A. S. Neill
1935 · Very good
€45
Grant Allen
1900 · Good
€65
George Bernard Shaw
1935 · Very good
€25
Thomas Henry Huxley
1889 · Fair
€30
Nathaniel Southgate Shaler
1915 · Fair
€30
M. Büsgen
1897 · Good
€65
Johannes Goedaert
1673 · Very good · NL
€970
Arabella B. Buckley
1876 · Good
€35
Alexander von Humboldt
1858 · Good
€110
William Beebe
1922 · Very good
€60